I know little about Scaletrax, but since no one has yet replied here, this might help... Forum member Dave Hikel has used scaletrax and also posted quite a bit on it's switches and use. Was going to provide you a link, but my search results yielded 17 threads and I wasn't sure how to properly link to that 'found searchs' page? So, I'll just give you the search terms I used.
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Contains all of these words: scaletrax switch
Posted by: Dave Hikel
It's been several years ago, but I do recall Dave posting about the Scaletrax switches pros, cons, work arounds, fixes, improvements, etc. but I don't recall which thread that was in? He also posted details about improvements MTH made to them a few years ago. I believe many of the improvements were from his suggestions in working with MTH on some of the issues he had found.