I made my own.
Have a look in my co thread. I'll dig it out later if you can't be bothered.
I remember seeing the one you made a while back. Is it practical? Does it ever slip?
It does not slip. It does move a bit back and forth, but I am a heavy rider and the seat tube is a bit ovalised from heat distortion and having a too short seat post mounted.
I found it:
https://www.lfgss.com/comments/15330682/
https://www.lfgss.com/comments/15332273/
@JamJam started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
I made my own.
Have a look in my co thread. I'll dig it out later if you can't be bothered.