Currently on the layout is a lash-up of RF&P GP and SW1200 #81. RF&P ordered 3 of these switchers that were geared to be able to used as mainline power and 81 was one of them. It was primarily used as a switcher in the ACCA yard in Richmond, but was occasionally pressed into service as a supplemental power on the run to DC.
All of the MTH units in the consist play well together. Nice change of pace from prior lash-up attempts.