:cool Being in the aluminum business, I found some u-channel extrusion and a rubber gasket/beading to fit the u-channel to hold 1/4 inch lexan and designed and bent the aluminum to fit the contour between the roll bars. Got everything cut and put it together and it works great. It comes up 4 inches above the rear deck and breaks the air flow from buffeting the back of your head. It's mounted with 2 sided tape and just the pressure against the roll bars and the tape, make it very sturdy. I would have to remove the lexan to move the frame.It's open across the top of the lexan, I finished the top cut with a torch to get the smooth polished finish by melting the lexan along the top cut. Because companies won't spend the $ to produce aftermarket items because of the lack of XLR's , We end up doing our own aftermarket items. It looks professional and like it came on the car from GM. I took it by the dealership today and they could'nt believe how great it looked and professionally it was built and installed. When i get a chance, I'll post some pictures of this and some other things done to the car. Bill