Do I need to cut the exposed part of the windshield and back glass gaskets to better access the trim clips? I have the cheap triangle pointed-head tool but can't seem to feel the clips trying to slip it underneath the gasket. Maybe not going far enough under? The original gaskets are pretty hard. When you do feel the clip are you pushing the bottom of the clip up or pulling the top down? This is for 69 Barracuda fastback. Not worried about the windshield but I sure do need to be careful and not crack the back glass. Any tips would really help. Thanks for any and all advice.