jerry,
I wanted a Standard ga passenger set, streamline,, aristo cars are std scale, I sent video to lionel, service,, they liked it, I did this I think 2010, or before, the pass set does have talking station,, Santa Fe. also sent video to aristo.. the gp20 was easier to do than aristo motor drive . I had to pin the axle to the gear, on both, I took pictures of it, also trucks had to be extended 1/4 each side,
I guess this should be in STD post..lol...