[Sachiel7]

Yes, for two years we ran a 4WD system with sprockets directly off the CIMs, and had No trouble at all.
In fact, in was probably one of our smoothest and most powerful drive systems over the past few years.
The way we did it - Take a 1"x5/8" shaft, lathe a 8mm hole through the core, add in some setscrew spots, and we used industrial epoxy to assist holding them onto the CIM shafts.
Most #35 sprockets run with a 5/8" shaft + keyway.
The systems we've built have worked fine. I'm not entirely sure what the fuss is all about...