V2 recommended (diagonal printing yields higher strength, but may not be as aesthetic)

0.2mm layer, 5 walls, 5% infill

0.08mm layer, 2 walls, 15% infill

0.2mm layer, 5 walls, 0% infill

v1

HRR Hot Shoe Phone Mount V2

HRR Hot Shoe Phone Mount V1 (not recommended)

Bottom GoPro male mount

The bottom has more rotation space, so compatibility should be better

Bicycle Mount GoPro Splitter V1

V1

V2 is tighter, fits better

v1 might be a bit loose

0.08mm layer, 5 walls, 40% infill

0.08mm layer, 2 walls, 15% infill

Please note that it is the upper style with three thin grooves on the body. See detailed image

(Recommended) V2 Straight Bore 8.5mm

Anything with a hole diameter greater than 7.8mm can be used. If the hub is wide, you can scale the size appropriately

[Designer's Recommendation] V2 improvements: Compatible with both disc and stick shapes; toilet cleaner (optional high/low dissolution versions)

V1