GoPro mount for anything cylindrical between 20/40mm. with thumbscrews to insert m5 nuts to create the high clamping force.
i would recommend using 2 m5x40mm bolts
printing in petg so you don't have much problems when you're using it on a sunny day.
i printed it in 0.24mm layer height with 4 perimeters 6 top and bottom layers and 15% gyroid infill
The author hasn't provided the model origin yet.