Runcam 2 mount for Source One V3. Angled at about 16 degrees.

Creality

Ender-3 S1 Pro

Doesn't Matter

Yes

I don't know if TPU is the best option. I printed it with TPU, but kind of regretted it while removing the supports. Especially the gap for the strap is difficult to free of support material. I ended up accidentally poking a hole through the top of the print.

You also can't tighten the screws too tight when printing with TPU, otherwise they will go through the hole, and it won't hold the print to the drone.