I want to add something about this to the WIKI.
I understand the current schema.
I.e - Assuming MAME stays at version 104, PowerMAME 104 (maybe should have been 104.0.0) was the initial release. 104.0.1 fixes the LED Output problem. 104.0.2 would be another bugfix. 104.1.0 (assume the bugfix column reverts to 0) will have set49 mode support. 104.1.1 would be a bugfix for this build. 104.2.0 might include set49 mode and add dual-mouse support.
Q1 - Assume PowerMAME 104.1 gets releeased, but MAME goes to version 105 before dual-mouse support is added and PowerMAME updates to the MAME 105 core, does the version with dual mouse support and MAME105 become 105.0.0 (but the release notes mention dual mouse support), or does it become 105.2.0 (continuing additions from the 104.1.0 build)
Q2 - What about the "u" builds. 104u1 incorporates Silver's lightgun fixes. Will we see a PowerMAME incorporating the u build updates, or only when official builds are released? (Keep in mind the third u build is often more stable than a new official build of MAME). If a PowerMAME based on U build is planned, how would it be numbered (104u1.0.0, 104u1.2.0, etc.).
Sorry for the nit-picking questions . . .