Hooked up my SCTEs with the MIP kit, some new kicks and a few other upgrades. However, I've run into a problem. The MIP chassis + dual bearing King Headz motor mount and center diff upright is less compatible than I had hoped. With the stock 40t spur, the gear is dangerously close to the chassis -- apparently with the MIP 41t it actually does rub the chassis itself. However, the problem I am having is that the spur rubs the rear part of the gear groove in the chassis. It is minimal, but nevertheless causes a bit of bind.

Matt Olson mentioned that uses spacers to lift the KHZ mounts slightly from the chassis when running the MIP 41t. What spacers were used? Any other suggestions to fix this issue?

It seems the issue with the spur gears only happens withe the MIP chassis + KHZ mounts. Stock chassis + KHZ mount = no issues. MIP chassis + stock mounts = no issues. KHZ chassis + KHZ mounts = no issues. MIP chassis + KHZ mounts = issues.

As an aside, the other issue I had with the KHZ mounts was that the set screw for the pinion gear needed to be dremeled down a couple of mm to properly fit the pinion and set the gear mesh (it otherwise sticks out too far on the motor shaft or hits the motor mount).