Hi Davy
Thanks for the extra information and really would appreciate any other pictures. I can follow that idea of the parts hunt. Even that information helps explain the concept.
It's for my outside garden layout I started last spring. Not as complicated as yours but a lot of fun. Getting back on it currently with buildings.
But the TT project is going to be inside a building but for G scale train outside layout.
I have a additional track plan that goes from this existing area to one of my out buildings and it run the G trains in and out from the building hopefully with the assistance of a TT .
I really like the way you did those TT. Especially cost.
Boy the price for a factory made one over here is astronomical!!!! so I'm going to make one. with some luck
Larry
Larry