My CRT.5 conversion

[BrianG]

The person looking into the plastic spur is not having much luck. Mike is also looking into it, but it's not high on the priority list right now. The good news is that Mike now sells hardened steel pinions from 12T up to 20T (IIRC) in even increments. This will let you use the stock diff with no modifications.

To find the hardened pinions, just go to the gears section of the store and scroll down to the Mod1 5mm bore pinions. The hardened ones are listed in the dropdown list. Don't forget to pick up a 5mm to 1/8" bore adaptor (on the same page) if using a motor with 1/8" shaft.