You could try setting it up centrally as before, pulling the brakes, and then using the set screws to centre, and see if it holds (teeny-weeny allen key holes at the level of the spring ends - 2mm?).
@BringMeMyFix 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.
You could try setting it up centrally as before, pulling the brakes, and then using the set screws to centre, and see if it holds (teeny-weeny allen key holes at the level of the spring ends - 2mm?).