In theory I think this should work. I'm leaning towards CCBs and would like the added barrel clearance. My concern is about tire rub at 285/30/20 in front. Not sure if fitment is already tight but that diameter is very slightly taller than 275/35/19 and some people with spacers have rubbed.
It looks like the wheel cost is about $960/wheel so not cheap. Someone do this and let us know!
Edit: I guess I missed this thread where it has been done. Awesome!
826M Square Set Up
https://g80.bimmerpost.com/forums/sh....php?t=1808131