I cut the right side down another 1/4" or so, sanded it and then started working on the windscreen. By the end of the night, I had the windscreen cut to the final finish and sanded, of course.
It is working fairly well to cut and then sand first with the 100 grit handle mounted sand paper, then the 80 grit foam sander, followed by the 220 grit foam and finally the 400 grit foam.