O.K. I finally got the new Transfer Switch. The PowerMax PMTS 50 is slightly different from the IOTA (discontinued). I called the Power Max tech to verify the wire placement and put it in the coach.
Everything seems to be working fine, but I guess I won't be able to relax until I get to a park with 50amp service and see if the same issues arise as when we were in NYC in June.
If anything changes, I'll let you know. Thanks for all the input.