barrel bushing
There is one other thing you should do, Glad to hear the emery cloth worked for you. Most folks have no idea how small .0005 is.
You should get a round hone stone and take the bushing on the inside part toward the frame stone a semi circular area abour 1/4 way into the bushing making the back end eliptical about .005 to allow the tip motion at locking. Dan
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