I didn't catch the discussion about the butt rib swap before I installed mine as per the manual. I'm wondering now if the limited edge distance will cause cracks in the windshield when enlarging the mount holes to .25 inches. It looks like there will only be about 1/8th of an inch edge distance. Thought I'd trim after enlarging the holes and possibly leaving an additional 1/8th inch material beyond the butt rib as that should easily overlap the wing #1 rib. Any thoughts and/or recommendations would be appreciated.