Got the sub 1:41! You can barely squeeze out another framerule in 1-2, so that's the framerule I saved in this run. As far as I know, there are no more framerules to be saved over this run.

Retiming: (6254 - 197) / 60.098813897441 = 100.7840 or 1:40.784

Played on Nestopia UE