Camera Mount for large skateboard

This is something I made for my skateboard so I can place an old mobile phone to record my ride. The top piece is meant to be printed separately so the thread can be printed vertically without support and then slide tightly into place and glued if you want but may not need it.
The recording quality may shake as this is not on the board itself, I wanted to keep the camera flat but show the board bend on turns.
The axel diameter was around 24mm with an angle edge to strengthen so I have that built into the clamp to prevent it swivelling around

NOTE: photo shown is original version which is thinner on top bar to the new uploaded thicker. Also the original had nut holes difficult to get in, but I've rotated the 8mm nut position so it cut into the long arm piece better but I haven't reprinted to test this now.

NEW: main-V2 file is the new main base arm which is 45 deg back rather than vertically up making it less likely to be kicked. Make sure you have thick walls to secure the weig