Fisherdoc, Listen to GGG's & GRJ's advice. Avoid 5-volt boards. I had 5-6 of the 5-volt locos. Every one has been replaced with a 3-volt board. Only 1-2 did not fail. I gutted the wiring and used upgrade kits--did the work myself. I also used 2.5F supercapacitors instead of batteries.
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