964 rear quarter-window seal in a 911 body?

[Formerly Steve Wilkinson]

I hate to do this, since Milt's recent post about putting a 964 windshield seal into a 911 turned into the War and Peace of threads...but is there anything I should know before replacing the rear quarter glass and seals on an '83 SC with Plexiglas and 964 rubber?

Here's the dill: I'm replacing the windshield with Lexan fitted into a 964 seal, and replacing the rear window with a flush-mounted piece of Lexan in a f/g frame, to eliminate the step at the back of the roof for better aeros. So the soft-metal trim strips are history, fore and aft.

I'm replacing the rear quarter windows with Plexiglas--no sense spending money on Lexan for those almost totally unstressed areas, I figger--and it would seem odd to put the Plexiglas in place with 911 seals, since that would lead to the oddity of anodized aluminum trim strips (which I hate anyway) in only two places on the car.

Can I simply use the stock glass for patterns to cut the Plexiglas and put it into 964 rubber, or is it more complicated than that?