Why, oh why, did they use hex screws???  This has pretty much destroyed my weekend!  I went by the illustration and it showed the RIGHT arm as "C".  Yes, I should've READ the instructions but I figured the illustration would be right, right??  Well it was actually the LEFT arm, and when I went to remove each arm (yes I did both chairs as the Right arm for "C"), I could only get 3 screws undone....because 1 of them (in the same place on each chair!!), was stripped.  I now have 2 chairs that each have a stripped screw on the wrong side, and can't do a thing about it until I receive the extractor kit I was forced to buy on Amazon.  I am a little person, for goodness sakes, and these screws should NOT have stripped so easily!!!!  Be careful and don't make a single mistake with assembly, cuz you can't un-do it.  :o(