How to find the right gear ratio ?

[nitrostarter]

Andrea- Have you mounted this in yet? My concern is the thickness of the mount takes away some surface area on the motor shaft. I hope this doesn't affect the gear mesh and being able to tighten down on the pinion set screw.

If this does become a problem, I'm sure you could machine a groove in the front to fit an Allen wrench in there like the RC-M or FLM mount does.