Interesting, but I was quite sure that the original spur was in module 1. So you tell me that 32DP? It seems huge...

Yes I'm running a 1/8 to 5mm adapter (the Hobao one, made in steel). It seems to run perfectly, surely not as fast as the 1/8th motors, but I think it will be enough for our small track. If not, I will try a 5500 motor and a SC ESC...