One thing to note on the BRM Porsches. There is a chassis change on the later cars. I have an earlier chassis and it makes the motor sit lower than the axle. I didn’t get my gear lash set properly and I munched my crown gear. BRM does make a shim to raise the motor to be inline with the axle and prevent the destruction of the gear. I have a shim and 2 new gears on their way, but I wanted to make everyone aware of the issue in case they are looking to get one of these cars.
-Shawn