Power Meters / Powermeters (SRM, Powertap, Quarq, Ergomo, Vector, Stages, power2max, P2M, 4iii, InPower, Cinch)

Rotors are a bit of a turn off - proprietary, expensive and not brilliantly reliable bb's

I'll give you the 2nd one. Proprietary BB? Only the 3d24 track. The others can use any brand of BB you care to buy. I use a 7900 one with mine, faultless.

Is yours BB30 or GXP?