I have the Royal Gorge set that my grandson and I set up for Christmas. I added a track expansion set with elevated track. There have always been some relatively minor issues with couplers releasing randomly but now much worse with the elevated track. Also part of the couplers on the passenger cars that protrude downward catch in the track. Can couplers be replaced with something that works better? I don't see an obvious way to disassemble the cars to replace the couplers.
Thank you