What is the procedure to install MTH proto-sound in vintage Lionel. I am looking for a particular MTH Alco, and it's generally not available. If I wanted to install proto-sound in a vintage Lionel, how would I go about it. I know the other manufacturers make numerous locos with TMCC, but I learned long ago that Proto-sound and TMCC don't gee-haw. Am I barking up the wrong tree?
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