This is a camera mount system I designed for mounting on a bicycle. It has two clamps, a stick (10 mm tube) and a tensor with a wire.

The clamps and tensor are 3d printable, the stick is a 10 mm aluminium tube and the wire is an ordinary brake wire.

4 mm screws and nuts are necessary.

A video instruction is on my Youtube channel:
https://www.youtube.com/watch?v=E5sy9A5yBsM

any questions, please leave me a comment.

JJ