Upgrade scanning setup for MF

It might have been this thread:

Or could it have been this one?

Either way, just using your own illustration, with a 24MP camera and a single shot:

6x6 (56 x 56mm)- 16 MP
6x7 (56 x 67mm) - 19 MP
6x9 (56 x 82mm) - 23.5 MP

Stitched, long side of sensor across width of film:

6x6 (56 x 56mm)- 36 MP
6x7 (56 x 67mm) - 43 MP
6x9 (56 x 82mm) - 52 MP