I have a Diecast GG1 from Railroad Warehouse to be repaired. It was designed as a static model, I’m told, even though it has one powered truck. The owner used it as a working locomotive, and one worm chewed up one nylon gear. It needs either a new gear, or - preferably - repowering both trucks. Does anyone else have one of these beasts? Any thoughts? Wheelbase of the power truck is 4&3/32 inches.