I took the cross section of DontWorryAboutIt's Hill mount bearing and modified it to fit Ivan Urbánek's Strurdy mount for Hadley telescope. To build it you will need a bowden PTFE tube (4mm diameter, less than 1 meter long), 12 M4x10mm screws, 6 M4 heat set inserts and 6 M4 nuts.
Assembly:
The author remixed this model.
Added a base to make it more stable, made it smaller to fit sturdy instead of hill mount and added holes to screw onto mount