Im not sure, I did not perform the repair my local hobby shop did, but the engine was running just fine until yesterday. The repair occurred in February so i don't suspect it was that unless something wasn't done right and the part was only working for so long?
A new development, I reversed the engine in the direction of the switch it normally travels (clockwise instead of the usual counterclockwise) and the rear trailing truck on the engine clears both switches on the loop with no problems. Noticing this I flipped the engine around in the opposite direction and ran her and again no issues other than a hop on a rail joiner because atlas doesn't T the frog portion of their switches so I removed that joiner and the hop is gone. However the rear truck still derails in the forward direction (counterclockwise) during operation.
