When I had bolted on the roadster windshield and then hardtop, I noticed the cowl was being warped becuase the bottom of the hard top and the roadster windshield frame weren't the same curvature as the cowl. This could lead to cracking of the fiberglass as there would be stress on the fiberglass where the bolts were. Also, you could see the top of the cowl was "dished" between the bolts because of the stress. I had to do some reshaping anyway beciuse of the hood modifications, so I built up the area w/ duraglass. I didn't want it super thick, so I spent a lot of time shaping the hardtop so it fit as tight as possible before adding filler. It was pretty tricky as the shape of the hardtop and the aluminum windshield frame are a little different. If I got the hard top to fit good, the roadster frame was off and vice versa. I finally got it narrowed down to where they both fit very good and here will be no distortion when I bolt either of them on. This how they sit in thier natural state without tightening the nuts on the studs.