The locos are an RS-1 and C424. I don't have an extra reciever board so if I swap it, may just be trading problems....also I can tell you these locos not that easy to take apart so a bit hestitant to do that to another that runs fine. In any event I may try swapping receivers at some point....a likely issue. Still think odd the problem consistently goes away after the locos 'warm up'.....
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