Wolfgang wrote: “One used bent stainless steel bolts for mounting posts with cap nuts and another heated and bent the Lexan to be slightly curved for a more air resistant, tight fit.”
I’m the one on both of those. My side curtains are held in place with a couple of bent stainless steel bolts, but I can’t take credit for coming up with the idea. Just go to the search function and do a search for “ola miltorp” and it should pop up a few hits showing you how to build the side curtains out of 3/16” acrylic, how to bend the lower forward corner with a heat gun to seal against the corner posts better AND how to bend a stainless steel steel bolt to the right angle and then adjust it for your particular car to fit everywhere.
Let me know if you need more photos than are already in the earlier posts and I can take some for you. Now that it’s almost winter here, the top is up and windows in most of the time.