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for fuck's sake how do you adjust this screw? i guess the size is PH1 (the instruction manual doesn't say) but it still just cams out. i've tried the slotted too. the bits are low quality but still. i'm squeezing the arms together as far as they will go to relieve the spring tension. fucking undersized cheap ass zinc phillips head screw glued stuck with blue loctite. the screw head is already marred from the factory installation.