Jim I had watched that video, but just watched it again to check out the gaps. It looks like there is a gap between the standard level cars, baggage and dorm, but the high level cars look like they are pretty darn close. Hard to tell for sure.
Can't imagine they would be much different than the Super Chief set which are very close, and that's that why I didn't convert to Kadee, just removed the tacks. Hand painting all the diaphragms stiffened them up, and because they are so close together, it was a small issue in the curves. Gonna experiment with spraying the silver this time to keep it thin.
If you run your cars on bigger than 072 curves, Kadee's won't be an issue. I do run them on 072 and had to open up the ends of the draft gear box to get maximum swing so the cars wouldn't derail.
I'll just have to wait til I have them in my hands to decide, but after converting my Daylight cars to Kadee..... I really don't want to hassle with that again.