I think I got it. I think part of my trouble was understanding the darn DRO and bolt circle function. I made a new tumbler blank the same diameter and put one EXTRA hole (10 holes) on the first sample and that was obviously not right. My first one had 9 holes and it was close but not quite correct. So, I flipped it over and tried 8 holes, which is what I thought I was going to try the very first time, not sure what I was thinking then?
Anyway, 8 looks pretty good. I'm going to move on to making the side frames and see if I can get a motor mounted to an axel shaft and then I will really be able to see if it is close enough.
Jim