What I guess I'm trying to say is that they are known to be problematic, and in some cases probably not worth fixing. When I bought my choices were a contemporary 5166, or find a prewar original. This was 30 yrs ago, at the beginning of the "scale revolution." This was before widespread internet penetration and the birth of a certain auction site. No fasttrack, RealTrax and even Gargraves switches weren't great then.
If the OP gets it working, great, but if any of you see these online or on a table at a train show, I advise you to keep walking. There are much better alternatives today, and the bitterness of poor quality is remembered long after the sweetness of a "bargain" wears off!
