Any final word on MAME versions? There's some conflicting info. The tourney website says "183 or 223", George says "183 or 224" in his YouTube video announcing the tourney, and this thread says:
MAME 183 will be accepted. Probably the newer versions.
Based on a few tests, it looks like INPs recorded in any MAME 183-226 are cross-compatible for playback in any other MAME in that same range. The difficulty dips were renamed to "1, 2, 3, 4" in MAME 222, but neither that nor anything else seems to be causing desyncs.
At any rate, I submitted a 225 INP and would prefer to use that version, so lemme know if that's not OK so that I can switch if I need to.