keeping it on the mandrel and chucking it onto the rotary table, checked for everything to be flat, once finding center off the mandrel I used the X axis on the DRO, it was only used for determining length of the cut and distances of the rings, other than that is was all rotary table use. here is where it maybe even easier to just use the lathe for the whole project.
3 lines 90 degrees from each other
Once again I was not being particular with measurements except for the degree markings, everything else was though of as I went
30 degrees to each line, the doted lines are 45 from the 3 larger marks 
Limited tiny end mills and moving at a pretty good pace throughout the project, not the smoothest cut but in the end I will have them covered up as youll see…. 