Dave, you are really getting this stuff down well! Interesting tips on your fitting methods above too. I have been getting a brief urge every once in a while to fire up SCARM and these tips seem to add encouragement. 
Just as a FYI, I was just going to say that the curved switches have the spacing vs pick up roller problems. I think that is the main problem with them. I don't think it matters what type of switch either? I think it's just the way they have to make them to get the curves correct? Anyway, I believe some folks here have found work arounds. I imagine it's more of a problem with the smaller engines as with the numbered switches as well. That is about all I know about these, FWIW.
