This is a collar that fits on a the Feedback Sports Pro HD bike repair stand to mount a tool tray, Park Tools 106. I would have bought a tray from Feedback but they do not make one that is compatible with their best stand.
This model uses bike seat quick release (~$7 on amazon) to make the position of the tray adjustable. It also needs a M5, 40mm long bolt and M5 nut. This is to make the collar to be removable without pulling the stand apart.
The collar also has slots so the tray can be stored with the repair stand folded.
Design feedback is welcome as it is evolving as I use it more. Printed PLA but I will move to PETG or PA-CF for longterm use. I recommend printing with 3 perimeter walls and decent infil (~50%) for strength.
Fusion 360 model attached.
The author marked this model as their own original creation.