diff --git a/src/game/bondgun.c b/src/game/bondgun.c
index 4e57eef96..5a2b6be1e 100644
--- a/src/game/bondgun.c
+++ b/src/game/bondgun.c
@@ -52,7 +52,7 @@
 #include "types.h"
 
 #if VERSION >= VERSION_NTSC_1_0
-u32 var8009d0d0[2];
+struct sndstate *g_CasingAudioHandles[2];
 s32 var8009d0d8;
 u32 var8009d0dc;
 struct sndstate *g_BgunAudioHandles[4];
@@ -115,7 +115,7 @@ u32 var8009d144;
 s32 var8009d148;
 u32 var8009d14c;
 
-u32 var8009d0d0[2];
+u32 g_CasingAudioHandles[2];
 s32 var8009d0d8;
 struct sndstate *g_BgunAudioHandles[4];
 struct fireslot g_Fireslots[NUM_FIRESLOTS];
diff --git a/src/game/casing/reset.c b/src/game/casing/reset.c
index e4120490a..f9bd8954b 100644
--- a/src/game/casing/reset.c
+++ b/src/game/casing/reset.c
@@ -10,8 +10,8 @@ void casingsReset(void)
 	struct casing *end;
 	struct casing *casing;
 
-	var8009d0d0[0] = 0;
-	var8009d0d0[1] = 0;
+	g_CasingAudioHandles[0] = 0;
+	g_CasingAudioHandles[1] = 0;
 	var8009d0d8 = 0;
 
 	for (i = 0; i != ARRAYCOUNT(g_BgunAudioHandles); i++) {
diff --git a/src/game/casing/tick.c b/src/game/casing/tick.c
index 84dd8dd24..19a25e100 100644
--- a/src/game/casing/tick.c
+++ b/src/game/casing/tick.c
@@ -9,494 +9,73 @@
 #include "data.h"
 #include "types.h"
 
-const u32 var7f1a8660[] = {0x3e8e38e4};
-const u32 var7f1a8664[] = {0x3f7ae148};
+void casingTick(struct casing *casing)
+{
+	f32 tmp;
+	f32 tmp2;
+	f32 sp8c[3][3];
+	f32 sp68[3][3];
+	s32 i;
+	s32 j;
+	f32 lvupdate = g_Vars.lvupdate240freal;
+	f32 sp58;
 
-#if VERSION >= VERSION_PAL_FINAL
-GLOBAL_ASM(
-glabel casingTick
-/*  f01d9f0:	27bdff48 */ 	addiu	$sp,$sp,-184
-/*  f01d9f4:	afb40034 */ 	sw	$s4,0x34($sp)
-/*  f01d9f8:	3c14800a */ 	lui	$s4,%hi(g_Vars)
-/*  f01d9fc:	26949fc0 */ 	addiu	$s4,$s4,%lo(g_Vars)
-/*  f01da00:	3c017f1b */ 	lui	$at,%hi(var7f1a8660)
-/*  f01da04:	c682004c */ 	lwc1	$f2,0x4c($s4)
-/*  f01da08:	c4248660 */ 	lwc1	$f4,%lo(var7f1a8660)($at)
-/*  f01da0c:	afbf003c */ 	sw	$ra,0x3c($sp)
-/*  f01da10:	afb50038 */ 	sw	$s5,0x38($sp)
-/*  f01da14:	46041182 */ 	mul.s	$f6,$f2,$f4
-/*  f01da18:	afb30030 */ 	sw	$s3,0x30($sp)
-/*  f01da1c:	afb2002c */ 	sw	$s2,0x2c($sp)
-/*  f01da20:	afb10028 */ 	sw	$s1,0x28($sp)
-/*  f01da24:	afb00024 */ 	sw	$s0,0x24($sp)
-/*  f01da28:	c4800014 */ 	lwc1	$f0,0x14($a0)
-/*  f01da2c:	3c013f00 */ 	lui	$at,0x3f00
-/*  f01da30:	44814000 */ 	mtc1	$at,$f8
-/*  f01da34:	46060301 */ 	sub.s	$f12,$f0,$f6
-/*  f01da38:	c4840008 */ 	lwc1	$f4,0x8($a0)
-/*  f01da3c:	46081282 */ 	mul.s	$f10,$f2,$f8
-/*  f01da40:	3c12800a */ 	lui	$s2,%hi(var8009d0d8)
-/*  f01da44:	460c0400 */ 	add.s	$f16,$f0,$f12
-/*  f01da48:	0080a825 */ 	or	$s5,$a0,$zero
-/*  f01da4c:	2652d0d8 */ 	addiu	$s2,$s2,%lo(var8009d0d8)
-/*  f01da50:	46105482 */ 	mul.s	$f18,$f10,$f16
-/*  f01da54:	c48a0000 */ 	lwc1	$f10,0x0($a0)
-/*  f01da58:	46122180 */ 	add.s	$f6,$f4,$f18
-/*  f01da5c:	e4860008 */ 	swc1	$f6,0x8($a0)
-/*  f01da60:	c4880008 */ 	lwc1	$f8,0x8($a0)
-/*  f01da64:	460a403c */ 	c.lt.s	$f8,$f10
-/*  f01da68:	00000000 */ 	nop
-/*  f01da6c:	4502004c */ 	bc1fl	.L0f01dba0
-/*  f01da70:	c6aa0010 */ 	lwc1	$f10,0x10($s5)
-/*  f01da74:	8e4e0000 */ 	lw	$t6,0x0($s2)
-/*  f01da78:	3c13800a */ 	lui	$s3,%hi(var8009d0d0)
-/*  f01da7c:	2411ffff */ 	addiu	$s1,$zero,-1
-/*  f01da80:	15c00009 */ 	bnez	$t6,.L0f01daa8
-/*  f01da84:	2673d0d0 */ 	addiu	$s3,$s3,%lo(var8009d0d0)
-/*  f01da88:	8e6f0000 */ 	lw	$t7,0x0($s3)
-/*  f01da8c:	55e00003 */ 	bnezl	$t7,.L0f01da9c
-/*  f01da90:	8e780004 */ 	lw	$t8,0x4($s3)
-/*  f01da94:	00008825 */ 	or	$s1,$zero,$zero
-/*  f01da98:	8e780004 */ 	lw	$t8,0x4($s3)
-.L0f01da9c:
-/*  f01da9c:	57000003 */ 	bnezl	$t8,.L0f01daac
-/*  f01daa0:	8e990034 */ 	lw	$t9,0x34($s4)
-/*  f01daa4:	24110001 */ 	addiu	$s1,$zero,0x1
-.L0f01daa8:
-/*  f01daa8:	8e990034 */ 	lw	$t9,0x34($s4)
-.L0f01daac:
-/*  f01daac:	3c13800a */ 	lui	$s3,%hi(var8009d0d0)
-/*  f01dab0:	2673d0d0 */ 	addiu	$s3,$s3,%lo(var8009d0d0)
-/*  f01dab4:	1b200037 */ 	blez	$t9,.L0f01db94
-/*  f01dab8:	00000000 */ 	nop
-/*  f01dabc:	06200035 */ 	bltz	$s1,.L0f01db94
-/*  f01dac0:	00000000 */ 	nop
-/*  f01dac4:	8e820284 */ 	lw	$v0,0x284($s4)
-/*  f01dac8:	24030002 */ 	addiu	$v1,$zero,0x2
-/*  f01dacc:	8c4a0658 */ 	lw	$t2,0x658($v0)
-/*  f01dad0:	106a0030 */ 	beq	$v1,$t2,.L0f01db94
-/*  f01dad4:	00000000 */ 	nop
-/*  f01dad8:	8c4b0dfc */ 	lw	$t3,0xdfc($v0)
-/*  f01dadc:	106b002d */ 	beq	$v1,$t3,.L0f01db94
-/*  f01dae0:	00000000 */ 	nop
-/*  f01dae4:	0c004b70 */ 	jal	random
-/*  f01dae8:	00000000 */ 	nop
-/*  f01daec:	44828000 */ 	mtc1	$v0,$f16
-/*  f01daf0:	240c0014 */ 	addiu	$t4,$zero,0x10
-/*  f01daf4:	04410005 */ 	bgez	$v0,.L0f01db0c
-/*  f01daf8:	46808120 */ 	cvt.s.w	$f4,$f16
-/*  f01dafc:	3c014f80 */ 	lui	$at,0x4f80
-/*  f01db00:	44819000 */ 	mtc1	$at,$f18
-/*  f01db04:	00000000 */ 	nop
-/*  f01db08:	46122100 */ 	add.s	$f4,$f4,$f18
-.L0f01db0c:
-/*  f01db0c:	3c012f80 */ 	lui	$at,0x2f80
-/*  f01db10:	44813000 */ 	mtc1	$at,$f6
-/*  f01db14:	3c013e80 */ 	lui	$at,0x3e80
-/*  f01db18:	44815000 */ 	mtc1	$at,$f10
-/*  f01db1c:	46062202 */ 	mul.s	$f8,$f4,$f6
-/*  f01db20:	3c017f1b */ 	lui	$at,%hi(var7f1a8664)
-/*  f01db24:	c4328664 */ 	lwc1	$f18,%lo(var7f1a8664)($at)
-/*  f01db28:	3c01bf80 */ 	lui	$at,0xbf80
-/*  f01db2c:	44813000 */ 	mtc1	$at,$f6
-/*  f01db30:	00116880 */ 	sll	$t5,$s1,0x2
-/*  f01db34:	ae4c0000 */ 	sw	$t4,0x0($s2)
-/*  f01db38:	460a4402 */ 	mul.s	$f16,$f8,$f10
-/*  f01db3c:	026d8021 */ 	addu	$s0,$s3,$t5
-/*  f01db40:	3c048009 */ 	lui	$a0,%hi(var80095200)
-/*  f01db44:	240effff */ 	addiu	$t6,$zero,-1
-/*  f01db48:	240fffff */ 	addiu	$t7,$zero,-1
-/*  f01db4c:	2418ffff */ 	addiu	$t8,$zero,-1
-/*  f01db50:	afb8001c */ 	sw	$t8,0x1c($sp)
-/*  f01db54:	46128100 */ 	add.s	$f4,$f16,$f18
-/*  f01db58:	afaf0018 */ 	sw	$t7,0x18($sp)
-/*  f01db5c:	afae0010 */ 	sw	$t6,0x10($sp)
-/*  f01db60:	8c845200 */ 	lw	$a0,%lo(var80095200)($a0)
-/*  f01db64:	e7a40058 */ 	swc1	$f4,0x58($sp)
-/*  f01db68:	02003025 */ 	or	$a2,$s0,$zero
-/*  f01db6c:	24058051 */ 	addiu	$a1,$zero,-32687
-/*  f01db70:	2407ffff */ 	addiu	$a3,$zero,-1
-/*  f01db74:	0c004241 */ 	jal	sndStart
-/*  f01db78:	e7a60014 */ 	swc1	$f6,0x14($sp)
-/*  f01db7c:	8e040000 */ 	lw	$a0,0x0($s0)
-/*  f01db80:	24050010 */ 	addiu	$a1,$zero,0x10
-/*  f01db84:	10800003 */ 	beqz	$a0,.L0f01db94
-/*  f01db88:	00000000 */ 	nop
-/*  f01db8c:	0c00cf94 */ 	jal	audioPostEvent
-/*  f01db90:	8fa60058 */ 	lw	$a2,0x58($sp)
-.L0f01db94:
-/*  f01db94:	1000006c */ 	b	.L0f01dd48
-/*  f01db98:	aea00040 */ 	sw	$zero,0x40($s5)
-/*  f01db9c:	c6aa0010 */ 	lwc1	$f10,0x10($s5)
-.L0f01dba0:
-/*  f01dba0:	c6a60018 */ 	lwc1	$f6,0x18($s5)
-/*  f01dba4:	c6a80004 */ 	lwc1	$f8,0x4($s5)
-/*  f01dba8:	460a1402 */ 	mul.s	$f16,$f2,$f10
-/*  f01dbac:	c6a4000c */ 	lwc1	$f4,0xc($s5)
-/*  f01dbb0:	3c013980 */ 	lui	$at,0x3980
-/*  f01dbb4:	46061282 */ 	mul.s	$f10,$f2,$f6
-/*  f01dbb8:	44810000 */ 	mtc1	$at,$f0
-/*  f01dbbc:	e6ac0014 */ 	swc1	$f12,0x14($s5)
-/*  f01dbc0:	27a7008c */ 	addiu	$a3,$sp,0x8c
-/*  f01dbc4:	02a04025 */ 	or	$t0,$s5,$zero
-/*  f01dbc8:	46104480 */ 	add.s	$f18,$f8,$f16
-/*  f01dbcc:	27a60068 */ 	addiu	$a2,$sp,0x68
-/*  f01dbd0:	24100003 */ 	addiu	$s0,$zero,0x3
-/*  f01dbd4:	460a2200 */ 	add.s	$f8,$f4,$f10
-/*  f01dbd8:	e6b20004 */ 	swc1	$f18,0x4($s5)
-/*  f01dbdc:	27a9008c */ 	addiu	$t1,$sp,0x8c
-/*  f01dbe0:	e6a8000c */ 	swc1	$f8,0xc($s5)
-.L0f01dbe4:
-/*  f01dbe4:	00001825 */ 	or	$v1,$zero,$zero
-/*  f01dbe8:	00e02825 */ 	or	$a1,$a3,$zero
-/*  f01dbec:	01001025 */ 	or	$v0,$t0,$zero
-/*  f01dbf0:	00c02025 */ 	or	$a0,$a2,$zero
-/*  f01dbf4:	8459002e */ 	lh	$t9,0x2e($v0)
-/*  f01dbf8:	24630001 */ 	addiu	$v1,$v1,0x1
-/*  f01dbfc:	44998000 */ 	mtc1	$t9,$f16
-/*  f01dc00:	00000000 */ 	nop
-/*  f01dc04:	46808420 */ 	cvt.s.w	$f16,$f16
-/*  f01dc08:	46008482 */ 	mul.s	$f18,$f16,$f0
-/*  f01dc0c:	50700013 */ 	beql	$v1,$s0,.L0f01dc5c
-/*  f01dc10:	e4b20000 */ 	swc1	$f18,0x0($a1)
-/*  f01dc14:	e4b20000 */ 	swc1	$f18,0x0($a1)
-.L0f01dc18:
-/*  f01dc18:	844a001c */ 	lh	$t2,0x1c($v0)
-/*  f01dc1c:	24630001 */ 	addiu	$v1,$v1,0x1
-/*  f01dc20:	24a50004 */ 	addiu	$a1,$a1,0x4
-/*  f01dc24:	448a8000 */ 	mtc1	$t2,$f16
-/*  f01dc28:	24420002 */ 	addiu	$v0,$v0,0x2
-/*  f01dc2c:	24840004 */ 	addiu	$a0,$a0,4
-/*  f01dc30:	46808420 */ 	cvt.s.w	$f16,$f16
-/*  f01dc34:	46008402 */ 	mul.s	$f16,$f16,$f0
-/*  f01dc38:	e490fffc */ 	swc1	$f16,-0x4($a0)
-/*  f01dc3c:	8459002e */ 	lh	$t9,0x2e($v0)
-/*  f01dc40:	44998000 */ 	mtc1	$t9,$f16
-/*  f01dc44:	00000000 */ 	nop
-/*  f01dc48:	46808420 */ 	cvt.s.w	$f16,$f16
-/*  f01dc4c:	46008482 */ 	mul.s	$f18,$f16,$f0
-/*  f01dc50:	5470fff1 */ 	bnel	$v1,$s0,.L0f01dc18
-/*  f01dc54:	e4b20000 */ 	swc1	$f18,0x0($a1)
-/*  f01dc58:	e4b20000 */ 	swc1	$f18,0x0($a1)
-.L0f01dc5c:
-/*  f01dc5c:	844a001c */ 	lh	$t2,0x1c($v0)
-/*  f01dc60:	24a50004 */ 	addiu	$a1,$a1,0x4
-/*  f01dc64:	24420002 */ 	addiu	$v0,$v0,0x2
-/*  f01dc68:	448a8000 */ 	mtc1	$t2,$f16
-/*  f01dc6c:	24840004 */ 	addiu	$a0,$a0,0x4
-/*  f01dc70:	46808420 */ 	cvt.s.w	$f16,$f16
-/*  f01dc74:	46008402 */ 	mul.s	$f16,$f16,$f0
-/*  f01dc78:	e490fffc */ 	swc1	$f16,-0x4($a0)
-/*  f01dc7c:	24c6000c */ 	addiu	$a2,$a2,0xc
-/*  f01dc80:	00c9082b */ 	sltu	$at,$a2,$t1
-/*  f01dc84:	24e7000c */ 	addiu	$a3,$a3,0xc
-/*  f01dc88:	1420ffd6 */ 	bnez	$at,.L0f01dbe4
-/*  f01dc8c:	25080006 */ 	addiu	$t0,$t0,0x6
-/*  f01dc90:	8e8b0034 */ 	lw	$t3,0x34($s4)
-/*  f01dc94:	00008825 */ 	or	$s1,$zero,$zero
-/*  f01dc98:	27b30068 */ 	addiu	$s3,$sp,0x68
-/*  f01dc9c:	19600009 */ 	blez	$t3,.L0f01dcc4
-/*  f01dca0:	27b2008c */ 	addiu	$s2,$sp,0x8c
-/*  f01dca4:	02402025 */ 	or	$a0,$s2,$zero
-.L0f01dca8:
-/*  f01dca8:	0c005844 */ 	jal	mtx00016110
-/*  f01dcac:	02602825 */ 	or	$a1,$s3,$zero
-/*  f01dcb0:	8e8c0034 */ 	lw	$t4,0x34($s4)
-/*  f01dcb4:	26310001 */ 	addiu	$s1,$s1,0x1
-/*  f01dcb8:	022c082a */ 	slt	$at,$s1,$t4
-/*  f01dcbc:	5420fffa */ 	bnezl	$at,.L0f01dca8
-/*  f01dcc0:	02402025 */ 	or	$a0,$s2,$zero
-.L0f01dcc4:
-/*  f01dcc4:	3c014580 */ 	lui	$at,0x4580
-/*  f01dcc8:	44810000 */ 	mtc1	$at,$f0
-/*  f01dccc:	02a04025 */ 	or	$t0,$s5,$zero
-/*  f01dcd0:	27a60068 */ 	addiu	$a2,$sp,0x68
-/*  f01dcd4:	27a5008c */ 	addiu	$a1,$sp,0x8c
-.L0f01dcd8:
-/*  f01dcd8:	00001825 */ 	or	$v1,$zero,$zero
-/*  f01dcdc:	01001025 */ 	or	$v0,$t0,$zero
-/*  f01dce0:	00c02025 */ 	or	$a0,$a2,$zero
-/*  f01dce4:	c4900000 */ 	lwc1	$f16,0x0($a0)
-/*  f01dce8:	24630001 */ 	addiu	$v1,$v1,0x1
-/*  f01dcec:	46008482 */ 	mul.s	$f18,$f16,$f0
-/*  f01dcf0:	5070000d */ 	beql	$v1,$s0,.L0f01dd28
-/*  f01dcf4:	4600940d */ 	trunc.w.s	$f16,$f18
-/*  f01dcf8:	4600940d */ 	trunc.w.s	$f16,$f18
-.L0f01dcfc:
-/*  f01dcfc:	24630001 */ 	addiu	$v1,$v1,0x1
-/*  f01dd00:	24420002 */ 	addiu	$v0,$v0,0x2
-/*  f01dd04:	24840004 */ 	addiu	$a0,$a0,0x4
-/*  f01dd08:	440e8000 */ 	mfc1	$t6,$f16
-/*  f01dd0c:	00000000 */ 	nop
-/*  f01dd10:	a44e001a */ 	sh	$t6,0x1a($v0)
-/*  f01dd14:	c4900000 */ 	lwc1	$f16,0x0($a0)
-/*  f01dd18:	46008482 */ 	mul.s	$f18,$f16,$f0
-/*  f01dd1c:	5470fff7 */ 	bnel	$v1,$s0,.L0f01dcfc
-/*  f01dd20:	4600940d */ 	trunc.w.s	$f16,$f18
-/*  f01dd24:	4600940d */ 	trunc.w.s	$f16,$f18
-.L0f01dd28:
-/*  f01dd28:	24420002 */ 	addiu	$v0,$v0,0x2
-/*  f01dd2c:	24840004 */ 	addiu	$a0,$a0,0x4
-/*  f01dd30:	440e8000 */ 	mfc1	$t6,$f16
-/*  f01dd34:	00000000 */ 	nop
-/*  f01dd38:	a44e001a */ 	sh	$t6,0x1a($v0)
-/*  f01dd3c:	24c6000c */ 	addiu	$a2,$a2,0xc
-/*  f01dd40:	14c5ffe5 */ 	bne	$a2,$a1,.L0f01dcd8
-/*  f01dd44:	25080006 */ 	addiu	$t0,$t0,0x6
-.L0f01dd48:
-/*  f01dd48:	8fbf003c */ 	lw	$ra,0x3c($sp)
-/*  f01dd4c:	8fb00024 */ 	lw	$s0,0x24($sp)
-/*  f01dd50:	8fb10028 */ 	lw	$s1,0x28($sp)
-/*  f01dd54:	8fb2002c */ 	lw	$s2,0x2c($sp)
-/*  f01dd58:	8fb30030 */ 	lw	$s3,0x30($sp)
-/*  f01dd5c:	8fb40034 */ 	lw	$s4,0x34($sp)
-/*  f01dd60:	8fb50038 */ 	lw	$s5,0x38($sp)
-/*  f01dd64:	03e00008 */ 	jr	$ra
-/*  f01dd68:	27bd00b8 */ 	addiu	$sp,$sp,0xb8
-);
-#else
-GLOBAL_ASM(
-glabel casingTick
-/*  f01d9f0:	27bdff48 */ 	addiu	$sp,$sp,-184
-/*  f01d9f4:	afb40034 */ 	sw	$s4,0x34($sp)
-/*  f01d9f8:	3c14800a */ 	lui	$s4,%hi(g_Vars)
-/*  f01d9fc:	26949fc0 */ 	addiu	$s4,$s4,%lo(g_Vars)
-/*  f01da00:	3c017f1b */ 	lui	$at,%hi(var7f1a8660)
-/*  f01da04:	c682004c */ 	lwc1	$f2,0x4c($s4)
-/*  f01da08:	c4248660 */ 	lwc1	$f4,%lo(var7f1a8660)($at)
-/*  f01da0c:	afbf003c */ 	sw	$ra,0x3c($sp)
-/*  f01da10:	afb50038 */ 	sw	$s5,0x38($sp)
-/*  f01da14:	46041182 */ 	mul.s	$f6,$f2,$f4
-/*  f01da18:	afb30030 */ 	sw	$s3,0x30($sp)
-/*  f01da1c:	afb2002c */ 	sw	$s2,0x2c($sp)
-/*  f01da20:	afb10028 */ 	sw	$s1,0x28($sp)
-/*  f01da24:	afb00024 */ 	sw	$s0,0x24($sp)
-/*  f01da28:	c4800014 */ 	lwc1	$f0,0x14($a0)
-/*  f01da2c:	3c013f00 */ 	lui	$at,0x3f00
-/*  f01da30:	44814000 */ 	mtc1	$at,$f8
-/*  f01da34:	46060301 */ 	sub.s	$f12,$f0,$f6
-/*  f01da38:	c4840008 */ 	lwc1	$f4,0x8($a0)
-/*  f01da3c:	46081282 */ 	mul.s	$f10,$f2,$f8
-/*  f01da40:	3c12800a */ 	lui	$s2,%hi(var8009d0d8)
-/*  f01da44:	460c0400 */ 	add.s	$f16,$f0,$f12
-/*  f01da48:	0080a825 */ 	or	$s5,$a0,$zero
-/*  f01da4c:	2652d0d8 */ 	addiu	$s2,$s2,%lo(var8009d0d8)
-/*  f01da50:	46105482 */ 	mul.s	$f18,$f10,$f16
-/*  f01da54:	c48a0000 */ 	lwc1	$f10,0x0($a0)
-/*  f01da58:	46122180 */ 	add.s	$f6,$f4,$f18
-/*  f01da5c:	e4860008 */ 	swc1	$f6,0x8($a0)
-/*  f01da60:	c4880008 */ 	lwc1	$f8,0x8($a0)
-/*  f01da64:	460a403c */ 	c.lt.s	$f8,$f10
-/*  f01da68:	00000000 */ 	nop
-/*  f01da6c:	4502004c */ 	bc1fl	.L0f01dba0
-/*  f01da70:	c6aa0010 */ 	lwc1	$f10,0x10($s5)
-/*  f01da74:	8e4e0000 */ 	lw	$t6,0x0($s2)
-/*  f01da78:	3c13800a */ 	lui	$s3,%hi(var8009d0d0)
-/*  f01da7c:	2411ffff */ 	addiu	$s1,$zero,-1
-/*  f01da80:	15c00009 */ 	bnez	$t6,.L0f01daa8
-/*  f01da84:	2673d0d0 */ 	addiu	$s3,$s3,%lo(var8009d0d0)
-/*  f01da88:	8e6f0000 */ 	lw	$t7,0x0($s3)
-/*  f01da8c:	55e00003 */ 	bnezl	$t7,.L0f01da9c
-/*  f01da90:	8e780004 */ 	lw	$t8,0x4($s3)
-/*  f01da94:	00008825 */ 	or	$s1,$zero,$zero
-/*  f01da98:	8e780004 */ 	lw	$t8,0x4($s3)
-.L0f01da9c:
-/*  f01da9c:	57000003 */ 	bnezl	$t8,.L0f01daac
-/*  f01daa0:	8e990034 */ 	lw	$t9,0x34($s4)
-/*  f01daa4:	24110001 */ 	addiu	$s1,$zero,0x1
-.L0f01daa8:
-/*  f01daa8:	8e990034 */ 	lw	$t9,0x34($s4)
-.L0f01daac:
-/*  f01daac:	3c13800a */ 	lui	$s3,%hi(var8009d0d0)
-/*  f01dab0:	2673d0d0 */ 	addiu	$s3,$s3,%lo(var8009d0d0)
-/*  f01dab4:	1b200037 */ 	blez	$t9,.L0f01db94
-/*  f01dab8:	00000000 */ 	nop
-/*  f01dabc:	06200035 */ 	bltz	$s1,.L0f01db94
-/*  f01dac0:	00000000 */ 	nop
-/*  f01dac4:	8e820284 */ 	lw	$v0,0x284($s4)
-/*  f01dac8:	24030002 */ 	addiu	$v1,$zero,0x2
-/*  f01dacc:	8c4a0658 */ 	lw	$t2,0x658($v0)
-/*  f01dad0:	106a0030 */ 	beq	$v1,$t2,.L0f01db94
-/*  f01dad4:	00000000 */ 	nop
-/*  f01dad8:	8c4b0dfc */ 	lw	$t3,0xdfc($v0)
-/*  f01dadc:	106b002d */ 	beq	$v1,$t3,.L0f01db94
-/*  f01dae0:	00000000 */ 	nop
-/*  f01dae4:	0c004b70 */ 	jal	random
-/*  f01dae8:	00000000 */ 	nop
-/*  f01daec:	44828000 */ 	mtc1	$v0,$f16
-/*  f01daf0:	240c0014 */ 	addiu	$t4,$zero,0x14
-/*  f01daf4:	04410005 */ 	bgez	$v0,.L0f01db0c
-/*  f01daf8:	46808120 */ 	cvt.s.w	$f4,$f16
-/*  f01dafc:	3c014f80 */ 	lui	$at,0x4f80
-/*  f01db00:	44819000 */ 	mtc1	$at,$f18
-/*  f01db04:	00000000 */ 	nop
-/*  f01db08:	46122100 */ 	add.s	$f4,$f4,$f18
-.L0f01db0c:
-/*  f01db0c:	3c012f80 */ 	lui	$at,0x2f80
-/*  f01db10:	44813000 */ 	mtc1	$at,$f6
-/*  f01db14:	3c013e80 */ 	lui	$at,0x3e80
-/*  f01db18:	44815000 */ 	mtc1	$at,$f10
-/*  f01db1c:	46062202 */ 	mul.s	$f8,$f4,$f6
-/*  f01db20:	3c017f1b */ 	lui	$at,%hi(var7f1a8664)
-/*  f01db24:	c4328664 */ 	lwc1	$f18,%lo(var7f1a8664)($at)
-/*  f01db28:	3c01bf80 */ 	lui	$at,0xbf80
-/*  f01db2c:	44813000 */ 	mtc1	$at,$f6
-/*  f01db30:	00116880 */ 	sll	$t5,$s1,0x2
-/*  f01db34:	ae4c0000 */ 	sw	$t4,0x0($s2)
-/*  f01db38:	460a4402 */ 	mul.s	$f16,$f8,$f10
-/*  f01db3c:	026d8021 */ 	addu	$s0,$s3,$t5
-/*  f01db40:	3c048009 */ 	lui	$a0,%hi(var80095200)
-/*  f01db44:	240effff */ 	addiu	$t6,$zero,-1
-/*  f01db48:	240fffff */ 	addiu	$t7,$zero,-1
-/*  f01db4c:	2418ffff */ 	addiu	$t8,$zero,-1
-/*  f01db50:	afb8001c */ 	sw	$t8,0x1c($sp)
-/*  f01db54:	46128100 */ 	add.s	$f4,$f16,$f18
-/*  f01db58:	afaf0018 */ 	sw	$t7,0x18($sp)
-/*  f01db5c:	afae0010 */ 	sw	$t6,0x10($sp)
-/*  f01db60:	8c845200 */ 	lw	$a0,%lo(var80095200)($a0)
-/*  f01db64:	e7a40058 */ 	swc1	$f4,0x58($sp)
-/*  f01db68:	02003025 */ 	or	$a2,$s0,$zero
-/*  f01db6c:	24058051 */ 	addiu	$a1,$zero,-32687
-/*  f01db70:	2407ffff */ 	addiu	$a3,$zero,-1
-/*  f01db74:	0c004241 */ 	jal	sndStart
-/*  f01db78:	e7a60014 */ 	swc1	$f6,0x14($sp)
-/*  f01db7c:	8e040000 */ 	lw	$a0,0x0($s0)
-/*  f01db80:	24050010 */ 	addiu	$a1,$zero,0x10
-/*  f01db84:	10800003 */ 	beqz	$a0,.L0f01db94
-/*  f01db88:	00000000 */ 	nop
-/*  f01db8c:	0c00cf94 */ 	jal	audioPostEvent
-/*  f01db90:	8fa60058 */ 	lw	$a2,0x58($sp)
-.L0f01db94:
-/*  f01db94:	1000006c */ 	b	.L0f01dd48
-/*  f01db98:	aea00040 */ 	sw	$zero,0x40($s5)
-/*  f01db9c:	c6aa0010 */ 	lwc1	$f10,0x10($s5)
-.L0f01dba0:
-/*  f01dba0:	c6a60018 */ 	lwc1	$f6,0x18($s5)
-/*  f01dba4:	c6a80004 */ 	lwc1	$f8,0x4($s5)
-/*  f01dba8:	460a1402 */ 	mul.s	$f16,$f2,$f10
-/*  f01dbac:	c6a4000c */ 	lwc1	$f4,0xc($s5)
-/*  f01dbb0:	3c013980 */ 	lui	$at,0x3980
-/*  f01dbb4:	46061282 */ 	mul.s	$f10,$f2,$f6
-/*  f01dbb8:	44810000 */ 	mtc1	$at,$f0
-/*  f01dbbc:	e6ac0014 */ 	swc1	$f12,0x14($s5)
-/*  f01dbc0:	27a7008c */ 	addiu	$a3,$sp,0x8c
-/*  f01dbc4:	02a04025 */ 	or	$t0,$s5,$zero
-/*  f01dbc8:	46104480 */ 	add.s	$f18,$f8,$f16
-/*  f01dbcc:	27a60068 */ 	addiu	$a2,$sp,0x68
-/*  f01dbd0:	24100003 */ 	addiu	$s0,$zero,0x3
-/*  f01dbd4:	460a2200 */ 	add.s	$f8,$f4,$f10
-/*  f01dbd8:	e6b20004 */ 	swc1	$f18,0x4($s5)
-/*  f01dbdc:	27a9008c */ 	addiu	$t1,$sp,0x8c
-/*  f01dbe0:	e6a8000c */ 	swc1	$f8,0xc($s5)
-.L0f01dbe4:
-/*  f01dbe4:	00001825 */ 	or	$v1,$zero,$zero
-/*  f01dbe8:	00e02825 */ 	or	$a1,$a3,$zero
-/*  f01dbec:	01001025 */ 	or	$v0,$t0,$zero
-/*  f01dbf0:	00c02025 */ 	or	$a0,$a2,$zero
-/*  f01dbf4:	8459002e */ 	lh	$t9,0x2e($v0)
-/*  f01dbf8:	24630001 */ 	addiu	$v1,$v1,0x1
-/*  f01dbfc:	44998000 */ 	mtc1	$t9,$f16
-/*  f01dc00:	00000000 */ 	nop
-/*  f01dc04:	46808420 */ 	cvt.s.w	$f16,$f16
-/*  f01dc08:	46008482 */ 	mul.s	$f18,$f16,$f0
-/*  f01dc0c:	50700013 */ 	beql	$v1,$s0,.L0f01dc5c
-/*  f01dc10:	e4b20000 */ 	swc1	$f18,0x0($a1)
-/*  f01dc14:	e4b20000 */ 	swc1	$f18,0x0($a1)
-.L0f01dc18:
-/*  f01dc18:	844a001c */ 	lh	$t2,0x1c($v0)
-/*  f01dc1c:	24630001 */ 	addiu	$v1,$v1,0x1
-/*  f01dc20:	24a50004 */ 	addiu	$a1,$a1,0x4
-/*  f01dc24:	448a8000 */ 	mtc1	$t2,$f16
-/*  f01dc28:	24420002 */ 	addiu	$v0,$v0,0x2
-/*  f01dc2c:	24840004 */ 	addiu	$a0,$a0,4
-/*  f01dc30:	46808420 */ 	cvt.s.w	$f16,$f16
-/*  f01dc34:	46008402 */ 	mul.s	$f16,$f16,$f0
-/*  f01dc38:	e490fffc */ 	swc1	$f16,-0x4($a0)
-/*  f01dc3c:	8459002e */ 	lh	$t9,0x2e($v0)
-/*  f01dc40:	44998000 */ 	mtc1	$t9,$f16
-/*  f01dc44:	00000000 */ 	nop
-/*  f01dc48:	46808420 */ 	cvt.s.w	$f16,$f16
-/*  f01dc4c:	46008482 */ 	mul.s	$f18,$f16,$f0
-/*  f01dc50:	5470fff1 */ 	bnel	$v1,$s0,.L0f01dc18
-/*  f01dc54:	e4b20000 */ 	swc1	$f18,0x0($a1)
-/*  f01dc58:	e4b20000 */ 	swc1	$f18,0x0($a1)
-.L0f01dc5c:
-/*  f01dc5c:	844a001c */ 	lh	$t2,0x1c($v0)
-/*  f01dc60:	24a50004 */ 	addiu	$a1,$a1,0x4
-/*  f01dc64:	24420002 */ 	addiu	$v0,$v0,0x2
-/*  f01dc68:	448a8000 */ 	mtc1	$t2,$f16
-/*  f01dc6c:	24840004 */ 	addiu	$a0,$a0,0x4
-/*  f01dc70:	46808420 */ 	cvt.s.w	$f16,$f16
-/*  f01dc74:	46008402 */ 	mul.s	$f16,$f16,$f0
-/*  f01dc78:	e490fffc */ 	swc1	$f16,-0x4($a0)
-/*  f01dc7c:	24c6000c */ 	addiu	$a2,$a2,0xc
-/*  f01dc80:	00c9082b */ 	sltu	$at,$a2,$t1
-/*  f01dc84:	24e7000c */ 	addiu	$a3,$a3,0xc
-/*  f01dc88:	1420ffd6 */ 	bnez	$at,.L0f01dbe4
-/*  f01dc8c:	25080006 */ 	addiu	$t0,$t0,0x6
-/*  f01dc90:	8e8b0034 */ 	lw	$t3,0x34($s4)
-/*  f01dc94:	00008825 */ 	or	$s1,$zero,$zero
-/*  f01dc98:	27b30068 */ 	addiu	$s3,$sp,0x68
-/*  f01dc9c:	19600009 */ 	blez	$t3,.L0f01dcc4
-/*  f01dca0:	27b2008c */ 	addiu	$s2,$sp,0x8c
-/*  f01dca4:	02402025 */ 	or	$a0,$s2,$zero
-.L0f01dca8:
-/*  f01dca8:	0c005844 */ 	jal	mtx00016110
-/*  f01dcac:	02602825 */ 	or	$a1,$s3,$zero
-/*  f01dcb0:	8e8c0034 */ 	lw	$t4,0x34($s4)
-/*  f01dcb4:	26310001 */ 	addiu	$s1,$s1,0x1
-/*  f01dcb8:	022c082a */ 	slt	$at,$s1,$t4
-/*  f01dcbc:	5420fffa */ 	bnezl	$at,.L0f01dca8
-/*  f01dcc0:	02402025 */ 	or	$a0,$s2,$zero
-.L0f01dcc4:
-/*  f01dcc4:	3c014580 */ 	lui	$at,0x4580
-/*  f01dcc8:	44810000 */ 	mtc1	$at,$f0
-/*  f01dccc:	02a04025 */ 	or	$t0,$s5,$zero
-/*  f01dcd0:	27a60068 */ 	addiu	$a2,$sp,0x68
-/*  f01dcd4:	27a5008c */ 	addiu	$a1,$sp,0x8c
-.L0f01dcd8:
-/*  f01dcd8:	00001825 */ 	or	$v1,$zero,$zero
-/*  f01dcdc:	01001025 */ 	or	$v0,$t0,$zero
-/*  f01dce0:	00c02025 */ 	or	$a0,$a2,$zero
-/*  f01dce4:	c4900000 */ 	lwc1	$f16,0x0($a0)
-/*  f01dce8:	24630001 */ 	addiu	$v1,$v1,0x1
-/*  f01dcec:	46008482 */ 	mul.s	$f18,$f16,$f0
-/*  f01dcf0:	5070000d */ 	beql	$v1,$s0,.L0f01dd28
-/*  f01dcf4:	4600940d */ 	trunc.w.s	$f16,$f18
-/*  f01dcf8:	4600940d */ 	trunc.w.s	$f16,$f18
-.L0f01dcfc:
-/*  f01dcfc:	24630001 */ 	addiu	$v1,$v1,0x1
-/*  f01dd00:	24420002 */ 	addiu	$v0,$v0,0x2
-/*  f01dd04:	24840004 */ 	addiu	$a0,$a0,0x4
-/*  f01dd08:	440e8000 */ 	mfc1	$t6,$f16
-/*  f01dd0c:	00000000 */ 	nop
-/*  f01dd10:	a44e001a */ 	sh	$t6,0x1a($v0)
-/*  f01dd14:	c4900000 */ 	lwc1	$f16,0x0($a0)
-/*  f01dd18:	46008482 */ 	mul.s	$f18,$f16,$f0
-/*  f01dd1c:	5470fff7 */ 	bnel	$v1,$s0,.L0f01dcfc
-/*  f01dd20:	4600940d */ 	trunc.w.s	$f16,$f18
-/*  f01dd24:	4600940d */ 	trunc.w.s	$f16,$f18
-.L0f01dd28:
-/*  f01dd28:	24420002 */ 	addiu	$v0,$v0,0x2
-/*  f01dd2c:	24840004 */ 	addiu	$a0,$a0,0x4
-/*  f01dd30:	440e8000 */ 	mfc1	$t6,$f16
-/*  f01dd34:	00000000 */ 	nop
-/*  f01dd38:	a44e001a */ 	sh	$t6,0x1a($v0)
-/*  f01dd3c:	24c6000c */ 	addiu	$a2,$a2,0xc
-/*  f01dd40:	14c5ffe5 */ 	bne	$a2,$a1,.L0f01dcd8
-/*  f01dd44:	25080006 */ 	addiu	$t0,$t0,0x6
-.L0f01dd48:
-/*  f01dd48:	8fbf003c */ 	lw	$ra,0x3c($sp)
-/*  f01dd4c:	8fb00024 */ 	lw	$s0,0x24($sp)
-/*  f01dd50:	8fb10028 */ 	lw	$s1,0x28($sp)
-/*  f01dd54:	8fb2002c */ 	lw	$s2,0x2c($sp)
-/*  f01dd58:	8fb30030 */ 	lw	$s3,0x30($sp)
-/*  f01dd5c:	8fb40034 */ 	lw	$s4,0x34($sp)
-/*  f01dd60:	8fb50038 */ 	lw	$s5,0x38($sp)
-/*  f01dd64:	03e00008 */ 	jr	$ra
-/*  f01dd68:	27bd00b8 */ 	addiu	$sp,$sp,0xb8
-);
-#endif
+	tmp2 = lvupdate * (1.0f / 3.6f);
+	tmp = casing->unk14 - tmp2;
+	casing->unk08 += lvupdate * 0.5f * (casing->unk14 + tmp);
+
+	if (casing->unk00 > casing->unk08) {
+		i = -1;
+
+		if (var8009d0d8 == 0) {
+			if (g_CasingAudioHandles[0] == NULL) {
+				i = 0;
+			}
+
+			if (g_CasingAudioHandles[1] == NULL) {
+				i = 1;
+			}
+		}
+
+		if (g_Vars.lvupdate240 > 0
+				&& i >= 0
+				&& g_Vars.currentplayer->hands[0].mode != HANDMODE_2
+				&& g_Vars.currentplayer->hands[1].mode != HANDMODE_2) {
+			sp58 = random() * (1.0f / U32_MAX) * 0.25f + 0.98f;
+
+			var8009d0d8 = PALDOWN(20);
+			sndStart(var80095200, SFX_8051, &g_CasingAudioHandles[i], -1, -1, -1.0f, -1, -1);
+
+			if (g_CasingAudioHandles[i]) {
+				audioPostEvent(g_CasingAudioHandles[i], 0x10, *(s32 *)&sp58);
+			}
+		}
+
+		casing->unk40 = 0;
+		return;
+	}
+
+	casing->unk14 = tmp;
+	casing->unk04 += lvupdate * casing->unk10;
+	casing->unk0c += lvupdate * casing->unk18;
+
+	for (i = 0; i < 3; i++) {
+		for (j = 0; j < 3; j++) {
+			sp8c[i][j] = casing->unk28[i][j] * (1.0f / 4096.0f);
+			sp68[i][j] = casing->unk1c[i][j] * (1.0f / 4096.0f);
+		}
+	}
+
+	for (i = 0; i < g_Vars.lvupdate240; i++) {
+		mtx00016110(sp8c, sp68);
+	}
+
+	for (i = 0; i < 3; i++) {
+		for (j = 0; j < 3; j++) {
+			casing->unk1c[i][j] = sp68[i][j] * 4096.0f;
+		}
+	}
+}
 
 void casingsTick(void)
 {
diff --git a/src/include/bss.h b/src/include/bss.h
index 8b28e3fa1..b9edfd833 100644
--- a/src/include/bss.h
+++ b/src/include/bss.h
@@ -124,7 +124,7 @@ extern struct briefingobj *g_BriefingObjs;
 extern struct criteria_roomentered *g_RoomEnteredCriterias;
 extern struct criteria_multiroomentered *g_MultiroomEnteredCriterias;
 extern struct criteria_holograph *g_HolographCriterias;
-extern u32 var8009d0d0[2];
+extern struct sndstate *g_CasingAudioHandles[2];
 extern s32 var8009d0d8;
 extern struct sndstate *g_BgunAudioHandles[4];
 extern struct fireslot g_Fireslots[NUM_FIRESLOTS];
diff --git a/src/include/constants.h b/src/include/constants.h
index fe3eb00cf..d85e69127 100644
--- a/src/include/constants.h
+++ b/src/include/constants.h
@@ -1138,6 +1138,7 @@
 
 #define HANDMODE_NONE  0
 #define HANDMODE_1  1
+#define HANDMODE_2  2
 #define HANDMODE_6  6
 #define HANDMODE_7  7
 #define HANDMODE_8  8
diff --git a/src/include/types.h b/src/include/types.h
index df0eb67d1..7c8f00155 100644
--- a/src/include/types.h
+++ b/src/include/types.h
@@ -6108,22 +6108,15 @@ struct musicevent {
 };
 
 struct casing {
-	/*0x00*/ u32 unk00;
-	/*0x04*/ u32 unk04;
-	/*0x08*/ u32 unk08;
-	/*0x0c*/ u32 unk0c;
-	/*0x10*/ u32 unk10;
-	/*0x14*/ u32 unk14;
-	/*0x18*/ u32 unk18;
-	/*0x1c*/ u32 unk1c;
-	/*0x20*/ u32 unk20;
-	/*0x24*/ u32 unk24;
-	/*0x28*/ u32 unk28;
-	/*0x2c*/ u32 unk2c;
-	/*0x30*/ u32 unk30;
-	/*0x34*/ u32 unk34;
-	/*0x38*/ u32 unk38;
-	/*0x3c*/ u32 unk3c;
+	/*0x00*/ f32 unk00;
+	/*0x04*/ f32 unk04;
+	/*0x08*/ f32 unk08;
+	/*0x0c*/ f32 unk0c;
+	/*0x10*/ f32 unk10;
+	/*0x14*/ f32 unk14;
+	/*0x18*/ f32 unk18;
+	/*0x1c*/ s16 unk1c[3][3];
+	/*0x28*/ s16 unk28[3][3];
 	/*0x40*/ u32 unk40;
 };