Have a corexy w/25.4mm steel tubing and the previous brackets required drilling holes and had no adjustability. This design uses a 3mm nut and bolt that clamps the tubing in place without needing a hole, allowing easy adjustment and removal.

Printed with: 0.3mm layer height, 3 perimeters/top/bottom, 15% gyroid infill. Should be orientated on the flat corner for best printing.

Step file included. I'm learning F360 so I'm sure there's a lot that could be done differently! ";^)