To get that 8mm screw, I went to Sears and bought an open-ended 8mm Craftsman wrench. That did the trick. Don't take the screw out of the hole once you have it loose. You'll be sorry because it's hard to get back in. Therefore, when you reinstall the assembly, it will take some patience and a little hit-and-miss, in order to line that screw up with the hole on the assembly.