Tabletop overhead shooting rig

This is a camera rig for making top down shots, often with your hands in them, maybe showing how something are made or explaining something on paper or similar. This rig is designed to have the camera sitting with the bottom facing the front, making the post processing of photos or video easier and due to the gravity based holder for the camera itself, it's easy to take the camera off for a quick b-roll shot or to check exposure and other settings. The top down style of shot is useful in bringing in the viewer to have a view that is very close to how it would be if you was actually there, often closing in on the subject and this rig have enough space to work in most cases, but it's still small enough to fit on most tables. I have used carbon fiber tailbooms from model helicopters, but besides the light weight and rigidity, it's not critical and aluminium tubes could also be used, I just had these laying around. The outer diameter is 22mm and the inner diameter is actually n