Reduced height crown

Hi Dan, your video on the reduced height crown was very helpful for me as I seem to make most of my CERECs this design. I like the tip of making the bevel on the buccal with the football diamond. However I still do get an occasional part of the margin that does not fit perfectly, and I am trying to make my powder as even as possible. Any ideas on how to correct this? I have also tried the rotate and position tools but sometimes the whole restoration moves off the margin and is open? Thanks,
Marty Williams