MAME game name: quartet2a
Full name: Quartet 2 (unprotected)
DIP switch notes: Difficulty set to Hardest, the rest of the settings are default
75% of a loop is done and the file seems to still sync on my old computer. Stages 19 and 24 are problem spots in that they don't feel fast to me even though that was the best I could get. For stage 24 it might be possible to not get the power orb in stage 2 and get it at the start but I think the wideness of the full shot is what makes some of the shots on the bosses work in some stages to begin with.