I wanted to use this Webcam mount (https://www.thingiverse.com/thing:2490356) but didn't have a camera mounting screw for my web cam. I found one (https://www.thingiverse.com/thing:2720049) but it was too short to fit through the mount. I used Microsoft 3D builder and split the screw just before the threads ended and added them on top until it would be long enough.