Well ye cool mods generally give high quality cases so chances are there was some defect, but as junbo said if you dont want to waste the case get a drill and grind off the head of the screw. That may be hard as the screw lay so low to the body but atleast if it is held up the case you can take pics of any defects you may find afterwards. You can also buy a whole set of new screws too for like $5 so its not that big of a loss .