I just acquired one of these and love it mostly. The TMCC was already upgraded to an ERR unit. It only has the smoke of/off and Prog/Run switches now. It still has the original style tether and it almost takes 2 people to assemble the tether and draw bar. I agree the tender wheels may be a little stiff from the wires. I may work on that, but they work on my 36 curves for now.
The one problem I am having is the engines front pickup. It keeps shorting against the frame. It runs well until a bump or jolt on the track and it stops. Even lightly sticks/welds to the frame. What do I do? Get smaller pickup rollers, grind the frame a little, Use liquid tape on the frame to insulate? I have a feeling it was primarily designed for 2 rail and the 3 rail clearance is a little tight.