I seem to recall someone posting a good solution to a missing Suntour barcon locknut - maybe tapping out a screw head? (not that I own any small metric taps) Anyway, I've been unable to find the post using the search function. Any other ideas? A source for actual locknuts? A nut from some other product that happens to be the right size? My local hardware and LBS turned up nothing. Best I can come up with is cutting a slot in an acorn nut, but that's not very elegant.