Alternate Roan stroller bracket for phi.gl's cup holder

When I found phi.gl's self-levelling cup holder for a stroller, I was fascinated. Sadly, the diameter of the bracket didn't fit our Roan stroller handle, because the handle is a little too fat for it. So i remixed the bracket with larger diameter. Then my wife hated the design because it was very difficult to adjust on the go (screwdriver necessary), so I remixed it again and added a large hole for a 3D-printed bolt and nut you can do and undo by hand. For nuts and bolts I experimented and failed spectacularly, so I used Knurling bolt and nut by akira3dp0 on Thingiverse - https://www.thingiverse.com/thing:1460364 - used the 60 mm and two nuts for extra security. The bolt and nuts had to be sized down to 80 % to fit the hole in my design. The bolt need high infill (over 50 %) or it snaps when you tighten it. The rest of the bracket: PETG, 0.2mm layer, min. 30 % infill.