SPF 2218 has a zipper rear window. I just finally put the top on for the first time Saturday. It works pretty well when it is cold out. Although I find myself driving a lot slower than I would like. Yesterday in my Sports Car Club rally, about an hour in, I forgot about the top and let it rip. When I pulled 4th the top just about exploded! Got real drafty inside too. Bent something and the side windows tried to lift out of the doors! LOL, YIKES!
I should have bought the black (used once) hardtop from my dealer. I think it would have looked great on my green car.
JB