Where will Scale55 get standard gauge equipment for interchange with 55n3? On3 cars become standard gauge cars for the era with some rework. Bachmann On30 supplies 5 foot wheelbase trucks. These can be widened to accommodate 28" O scale wheels to make Scale 55 standard gauge trucks. The Bachmann On30 Mogul can be reworked to become a small 0-6-0 switching loco with a new frame and HO 80" drivers. Harold