Hi John, I am sorry I missed the question about height of your upper track. the best advice I can ever got was to measure the height of your tallest car on the track and make your height 1/4" higher then that!
I have some well cars that look tall but found out they are nowhere near as tall as my auto carriers!
And for you guys fallowing I got the ceiling sheet rocked! Taking a couple days off then I will start one the walls!
@Tranquil Hollow RR Shoulders are a little soar, but not as bad as I thought they were going to be, its my bad back that sucks! LOL