diff --git a/tbxi/lowlevel.py b/tbxi/lowlevel.py
index 0995ec8..8bc6431 100644
--- a/tbxi/lowlevel.py
+++ b/tbxi/lowlevel.py
@@ -7,9 +7,9 @@ class MyParcelStruct(NamedTupleStruct, StringStruct):
 MAGIC = b'prcl\x01\x00\x00\x00'
 
 def pad(offset, align):
-	x = offset + align - 1
-	x -= x % align
-	return x
+    x = offset + align - 1
+    x -= x % align
+    return x
 
 PrclNodeStruct = MyParcelStruct('>I 4s I I I I 32s 32s', name='PrclNodeStruct',
     fields=['link', 'ostype', 'hdr_size', 'flags', 'n_children', 'child_size', 'a', 'b'])
@@ -18,16 +18,16 @@ PrclChildStruct = MyParcelStruct('>4s I 4s I I I I 32s', name='PrclChildStruct',
     fields=['ostype', 'flags', 'compress', 'unpackedlen', 'cksum', 'packedlen', 'ptr', 'name'])
 
 SuperMarioHeader = NamedTupleStruct('>I I B B I I H B B L L L L L L B B 4L L L L L', name='SuperMarioHeader',
-	fields=['CheckSum', 'ResetPC', 'MachineNumber', 'ROMVersion',
-	'ReStartJMP', 'BadDiskJMP', 'ROMRelease', 'PatchFlags', 'unused1',
-	'ForeignOSTbl', 'RomRsrc', 'EjectJMP', 'DispTableOff',
-	'CriticalJMP', 'ResetEntryJMP', 'RomLoc', 'unused2', 'CheckSum0',
-	'CheckSum1', 'CheckSum2', 'CheckSum3', 'RomSize', 'EraseIconOff',
-	'InitSys7ToolboxOff', 'SubVers'])
+    fields=['CheckSum', 'ResetPC', 'MachineNumber', 'ROMVersion',
+    'ReStartJMP', 'BadDiskJMP', 'ROMRelease', 'PatchFlags', 'unused1',
+    'ForeignOSTbl', 'RomRsrc', 'EjectJMP', 'DispTableOff',
+    'CriticalJMP', 'ResetEntryJMP', 'RomLoc', 'unused2', 'CheckSum0',
+    'CheckSum1', 'CheckSum2', 'CheckSum3', 'RomSize', 'EraseIconOff',
+    'InitSys7ToolboxOff', 'SubVers'])
 
 SuperMarioForeignOS = NamedTupleStruct('>7I', name='SuperMarioForeignOS',
-	fields=['InitDispatcher', 'EMT1010', 'BadTrap', 'StartSDeclMgr',
-	'InitMemVect', 'SwitchMMU', 'InitRomVectors'])
+    fields=['InitDispatcher', 'EMT1010', 'BadTrap', 'StartSDeclMgr',
+    'InitMemVect', 'SwitchMMU', 'InitRomVectors'])
 
 COMBO_FIELDS = {
     0x40 << 56: 'AppleTalk1',
@@ -39,34 +39,34 @@ COMBO_FIELDS = {
 }
 
 ResHeader = NamedTupleStruct('>L B B H H 6x', name='ResHeader',
-	fields=['offsetToFirst', 'maxValidIndex', 'comboFieldSize',
-	'comboVersion', 'headerSize'])
+    fields=['offsetToFirst', 'maxValidIndex', 'comboFieldSize',
+    'comboVersion', 'headerSize'])
 
 ResEntry = NamedTupleStruct('>Q L L 4s h B 256p', name='ResEntry',
-	fields=['combo', 'offsetToNext', 'offsetToData', 'rsrcType',
-	'rsrcID', 'rsrcAttr', 'rsrcName'])
+    fields=['combo', 'offsetToNext', 'offsetToData', 'rsrcType',
+    'rsrcID', 'rsrcAttr', 'rsrcName'])
 
 def ResEntry_padded_len(entry_tuple):
-	return pad(ResEntry.size - 256 + len(entry_tuple.rsrcName), 16)
+    return pad(ResEntry.size - 256 + len(entry_tuple.rsrcName), 16)
 
 FakeMMHeader = NamedTupleStruct('>4s L L L', name='FakeMMHeader', 
-	fields=['MagicKurt', 'MagicC0A00000', 'dataSizePlus12', 'bogusOff'])
+    fields=['MagicKurt', 'MagicC0A00000', 'dataSizePlus12', 'bogusOff'])
 
 ConfigInfo = NamedTupleStruct('>40x lLL lL lL lL lL lL lL 16sLLL LL LLLLbxxx LLLLL L LLLLLL 128s128s128s128s 128s LLLL L L lL LLL', name='ConfigInfo',
-	fields=['ROMImageBaseOffset', 'ROMImageSize', 'ROMImageVersion',
-	'Mac68KROMOffset', 'Mac68KROMSize', 'ExceptionTableOffset',
-	'ExceptionTableSize', 'HWInitCodeOffset', 'HWInitCodeSize',
-	'KernelCodeOffset', 'KernelCodeSize', 'EmulatorCodeOffset',
-	'EmulatorCodeSize', 'OpcodeTableOffset', 'OpcodeTableSize',
-	'BootstrapVersion', 'BootVersionOffset', 'ECBOffset',
-	'IplValueOffset', 'EmulatorEntryOffset', 'KernelTrapTableOffset',
-	'TestIntMaskInit', 'ClearIntMaskInit', 'PostIntMaskInit',
-	'LA_InterruptCtl', 'InterruptHandlerKind', 'LA_InfoRecord',
-	'LA_KernelData', 'LA_EmulatorData', 'LA_DispatchTable',
-	'LA_EmulatorCode', 'MacLowMemInitOffset', 'PageAttributeInit',
-	'PageMapInitSize', 'PageMapInitOffset', 'PageMapIRPOffset',
-	'PageMapKDPOffset', 'PageMapEDPOffset', 'SegMap32SupInit', 'SegMap32UsrInit', 'SegMap32CPUInit', 'SegMap32OvlInit', 'BATRangeInit',
-	'BatMap32SupInit', 'BatMap32UsrInit', 'BatMap32CPUInit',
-	'BatMap32OvlInit', 'SharedMemoryAddr', 'PA_RelocatedLowMemInit',
-	'OpenFWBundleOffset', 'OpenFWBundleSize', 'LA_OpenFirmware',
-	'PA_OpenFirmware', 'LA_HardwarePriv'])
+    fields=['ROMImageBaseOffset', 'ROMImageSize', 'ROMImageVersion',
+    'Mac68KROMOffset', 'Mac68KROMSize', 'ExceptionTableOffset',
+    'ExceptionTableSize', 'HWInitCodeOffset', 'HWInitCodeSize',
+    'KernelCodeOffset', 'KernelCodeSize', 'EmulatorCodeOffset',
+    'EmulatorCodeSize', 'OpcodeTableOffset', 'OpcodeTableSize',
+    'BootstrapVersion', 'BootVersionOffset', 'ECBOffset',
+    'IplValueOffset', 'EmulatorEntryOffset', 'KernelTrapTableOffset',
+    'TestIntMaskInit', 'ClearIntMaskInit', 'PostIntMaskInit',
+    'LA_InterruptCtl', 'InterruptHandlerKind', 'LA_InfoRecord',
+    'LA_KernelData', 'LA_EmulatorData', 'LA_DispatchTable',
+    'LA_EmulatorCode', 'MacLowMemInitOffset', 'PageAttributeInit',
+    'PageMapInitSize', 'PageMapInitOffset', 'PageMapIRPOffset',
+    'PageMapKDPOffset', 'PageMapEDPOffset', 'SegMap32SupInit', 'SegMap32UsrInit', 'SegMap32CPUInit', 'SegMap32OvlInit', 'BATRangeInit',
+    'BatMap32SupInit', 'BatMap32UsrInit', 'BatMap32CPUInit',
+    'BatMap32OvlInit', 'SharedMemoryAddr', 'PA_RelocatedLowMemInit',
+    'OpenFWBundleOffset', 'OpenFWBundleSize', 'LA_OpenFirmware',
+    'PA_OpenFirmware', 'LA_HardwarePriv'])