Hey
Bah Humbug - I contacted Power2Max to ensure there were no compatibility issues with my crankset and Rotor aero rings. The response that I got was essentially, "yeah, they fit fine, but get Praxis aero rings instead - they shift much better... cold forged, yadda yadda"
Praxis only has them in a mid-compact in a 110 BCD, though. That would make my life 4% harder.