Tom, As a former automobile mechanic AND tool salesman, I vote with the impact driver contingent AND I would mention as someone else has, that the screw is probably a "Japanese Industrial Standard" screw. Try to locate a bit of that type for your (new) impact driver (and matching screwdriver set!) Model airplane (and other radio control) enthusiasts have sources for these. Use them for your Young Changs, etc, and make life a lot easier. John Dorr Helena, MT
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