I bought this loco as a non-runner but very good cosmetic condition and no box. The model revealed itself to be DCC fitted but with no blanking plug. I fitted a generic blankng plug but the loco runs backwards when it should run forwards and vice versa on DC. It seems to be an excellent runner so I want to get it running on DC correctly but notice that the motor is mounted with the worm drive at the rear of the motor. Before I unsolder and swap over the connections to the motor, is there a blanking plug designed for this situation and, if so, where do I get it from please?