N7, as I was reading your last post, with your description of "ripples" I came to the same conclusion as Craig. Please check to be certain you are using 4-40 fasteners and that they are the correct length. The bottom and top screws are different. Remember that, when measuring the length of a cap head screw, you do not include the cap.
Please believe me when I say you are the only person we know of reporting this problem. I don't mean there isn't the odd breakage here and there -- everybody has that -- but you are the only person we know who breaks them in the quantity you do. Something on your car is wrong, something has been overlooked.
I make this sort of mistake constantly -- we all do from time to time -- so please take a second careful look.
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