I recently bought a plated Santa Fe F7 with scale wheels. It has a fixed pilot and what looks to be a more prototypical sized coupler on the back. I'd like to use that F7 with a set of A&B F3s with hi rail wheels. Problem is the coupler on the F7 being smaller it does hook up with the larger coupler on the B unit but I have had a couple of times where it's disconnected. I took a look at the trucks on the F3s and they have completely different truck & coupler setup than the F7. What I'd like to do is buy scale wheel trucks from MTH that'll fit that coupler on the F7 but I can't figure out the part number. Does anyone know what MTH part number for scale wheel trucks? The F3 B unit I have is unpowered and the f3 A unit is powered so I'm looking for both powered and unpowered scale wheel trucks.
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