... . In this model that is the fixed wheel with the others compensated with traditional Sharman three point compensation. So I think it likely that the back to back on the rear drivers is a little tight. It may get a bit boring watching it go back and forth, back and forth but I wanted to demonstrate to myself that I could build track that worked and just in case it stops working between now and whenever it's taken for a run next, that i did have it working on the 20th October 2018! So celebabrations t one side what I haven't yet even really thought about is the signalling. I say not thought about, I really mean planned properly. I've got the Megapoints board installed ready to control them but I haven't worked out how to build them. So far I've thought I'd mount them on a rectangular brass base plate with a copper or brass tube soldered to the underside that would go through a close fitting hole in the baseboard and also serve as the mount for the signal and the frame for the servo(s ) ...