Climax Issues

[Birdog]

I am having significant electrical issues with my 50t HO Climax.
I installed a Micro-Tsunami with capacitor and the engine ran well for about 3 months. It now will move a few mm then stop and reset. Or not move at all. When parked the engine will idle all day long and sound normal. I can hold the engine in place with my finger and the engine will run, wheels turning sound on etc but the instant I attempt let it move forward or back on it's own the engine will stop and the decoder will reset over and over.
So....I have cleaned EVERYTHING; track, wheels, pickup pads, etc. No improvement.
I have replaced the capacitor with one of higher value, no improvement.
I am considering replacing the pickup pads and the truck wipers.
Does anyone know if I can get the pads or wipers for the climax (will the Shay parts work?) or do I have to manufacture them myself?
Any help or troubleshooting tips would be apreciated.
Thanks!