I thought about it a lot and searched the entire internet with no luck, and ended up assembling the HeadlessUSA string jaws with the thrust washer sammich intervening the knobs and bridge body. I lubricated the screw with a moly paste grease. The jaws extend just far enough to insert the ball ends without separating from the screws. The tuning knobs now turn relatively easily with no herky-jerky stops.
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That’s exactly how I did mine…so it must be correct