$ python3 forge_2635.py h2base.img craft2635.img
[walk] sroot slot @ 0x1400200: type=1 key=0xda2386b05c938000 data_off=0x140080a name=b'testvol'
[walk] sroot slot @ 0x1400280: type=1 key=0xde25e1c43fe18000 data_off=0x140040a name=b'LOCAL'
[walk] testvol inode @ 0x1400800 inum=0x1 type=1
[+] meta.inum 0x1 -> 0x42
[+] wrote craft2635.img