I don't doubt that the wear of those old switches, like my 022's play a role in the derailing. I have 8 or 9 of these switches, and tried them all. I've really isolated the problem to this one engine- the SW8. I haven't given up yet, and might pursue changing out those electro coupler arms if possible, to longer ones. Here are some pictures that I hope illustrate what I think is the problem.....,
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