While trimming the windshield multiple on off adjustments were needed. I found that two clecos, one on each side, as shown in the pic below, and a centering tick mark allowed presise repositioning. If you don't get the windshield back in the exact position each time, it is difficult to know where to trim.
It looks really cool with the glass in place, but it will all come off soon enough and go back into safe storage. It will be a long time before the top and windows are permenantly installed.