Join Date: Oct 2007
Location: Beacon Falls CT USA
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Tough to tell from the pictures what the set up is...but in the 'for what it's worth' category. When I replaced the portlights in my 72 NorthStar, I bedded the 1/2" plexiglass in the cutout hole that it sits in without the frame. I made sure with 3m 4200, that they were solid and water tight without any assistance of the 2-piece frame that trimmed and held them in place. Then I set the frames in place with 3m 4000 - more for cosmetic purposes that strength. This gave me the confidence that messing with bedding around the frame fasteners would have minimal effect on the strength and water-tightness of the plexiglass.
Sorry to blab if you don't have a similar set up.