Can someone tell me how the front rubber seal on the convertible top of a spider is supposed to fit on the windshield frame? I have a leak and have found that the thin forward lip of the seal runs in the groove along the frame in some areas and in front of it in others and think that may provide the opening for water to penetrate. Also, whether the seal should be all in the groove or in front of it, how do you adjust the top so it settles correctly?