"FYI, I went to Gargraves track and switches because Lionel switches don't work with my Williams engines, and I have around 10 powered Williams engines."

None of your 10 Williams engines work with the Lionels?  Are you referring to the Lionel 022's?

I know it has been mentioned in the past, but I would REALLY like to see a locomotive in Nickel Plate Road markings added to the list of GP-9's.