I'm having an issue installing OX 2 rear derailleur.  Specifically the chain doesn't appear to run over the rear pully correctly and rubs against the top of the cage when pedaling.  I assume I am doing something wrong - can anyone offer some advice?  For reference the chain is a Chinese made 12 speed that was working fine previously with a GX Transmission rear derailleur.

What has been the experience with pedal strikes? I am looking at this frame with 165x42.5, 120mm Sid Ultimate and 175mm cranks?

Any idea of travel with 165x45 shock installed? Ride review?