I went from "screwed" to "gasketed"...the windows now pop out too easily when you clean them and the gasket has shrunk to the point there is a 1/4 gap at the seam. If I had it to do all over again, I would have made a good template for the "screwed" windows and stayed with them.
The "screwed" would start to crack around certain holes in 3-5 years...the gasketed have been in there ten years...but are scratched from putting them back in every time I clean them and forget and put too much pressure on them. Now, the A&P may have cut the holes a smidgen too big...I wasn't in the shop when he did that work. Tony Crandell Flying N255H since "76" Serial 3181
