Great review. Keep this in mind:
The spring recipe from Ohlins specifically for the M2 has always been 90 N/mm front, 190 N/mm rear so you should really consider changing the rear spring to the 190 N/mm before testing as Ohlins never tested or intended the 230 N/mm rear spring on that model.
The springs included with the M2 specific kit at 200mm length front and rear. This is the same as the current kit spec'd for M2/M3/M4. Your front spring is 20mm short and will nearly coil bind at full compression. ...nearly...
Just a side note - spring preload is what dictates how much of one's travel is divided between bump and droop travel. Once that's set, the "height adjusting" gold cup at the base of the strut determines the static ride height. It does not determine the percentage of droop travel available from the total amount of travel.
Also, for the rear, great note on the shock length. Great clarification here that the shock length in a divorced arrangement does not dictate ride height, but does dictate bump and droop travel. You did a great job of clarifying that here!
I hope this helps. well done!
***Change rear springs to 190 N/mm before testing as this has always been Ohlins spec for M2***
