Magnetic Camera support

Hello!
I've been working on a way to fasten a small HD camera to metallic surface reusing furnitures I already had.
The idea is to use a magnet as a fastener that will be socketed into the fist designed part.
Then we can joint as many sticks as necesary to gain length (at the price of stability I guess).
Last part is the frame holding the camera.
The expected result is something like what you can find on the picture.

PS: STL files are in attachment.

PPS: a scale factor of 0.1 must by applied on each piece before printing.