Trimmed the aft edge of the windsreen using a sabre saw followed by a sanding drum. The screen was pre-scored on the desired cut line.
Placed the windshield bow into position at the specified 60 degree angle, then positioned the screen itself. Fit quite closely to the desired position. Will require some additional trimming of the windshield, and it looks like the bow might be slightly "bowed" that will take just a bit of encoragement to fit just right.