Thanks for replies. I started out in late 60s with N scale. By 2010 had over 100 engines. When I sold them I tested every one without a problem of any rot showing and ran as good as day purchased. I had several HO before moved into O scale from 80s upward and also a 8x16 layout. Never had a any problems with Zinc rot or frying electronics. Just seems that, a couple "O" items I had did get the "rot" but got replacement parts easily. Zinc rot is secondary worry compared to electronic failures for me, luckily the severe ones were under warranty.
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