John, from your 3-23-18 post, did you indeed post photo series showing your GS4 conversions/upgrades?? I am in process of MTH GS4 upgrade to PS3 and ran into the "pick-up" discussion, so wanted to insure I do ALL that is needed while inside the Loco and Tender?!? Your advice and guidance is greatly appreciated, G in Roanoke.
Well, not sure what post that might be, but the only thing I do is connect a 1.1A to 1.5A PTC between the locomotive and tender roller connection. This prevents wire meltdown if you derail one of the units and the roller lands on the outside rail.