this a model for an adapter that I needed maself to record overhead videos with my camera, this adapter lets you mount a selfie stick that's about 20mm in diammeter to a Tripod with the standared 6mm mounting screw. Then you can mount your camera to the same mount the selfie stick has and put some counter weight to stabilize the setup.To thighten the two halves of the part I'm using M4 bolts & nuts (the hole for the bolt cap is about 6.5mm)The mounting on the part can be salvaged from old camera or any other source then use a soldering iron to insert it inside the hole and melt the plastic around it and stick it permanentlyThe material to print, I just used PLA and it works fine