I just got a nifty MDC/Roundhouse 2-8-0 Consolidation, and was pleasantly surprised at how well it ran slow and fast around my test oval. After a few laps in each direction I decided to work on replacing the Rapido couplers with the included. The rear one was easy to exchange, but I'm not sure how to replace the one on the pilot (it's not as accessible). The more pressing issue is that the drivers seem to be bond now. It'll strain a bit, but no turning. I'm wondering if somehow in handling I rotated the drivers to a point where they got stuck. Any advice on how to proceed?