This balancing belt holder is a trick of physics. A normal belt is placed in the notch with both sides hanging down and the pointed end is placed on your fingertip. I saw this over 30 years ago in woodshop class!
I have a MOJO so all the settings are automatic, sorry.
I'm a mechanical design engineer with over 20 years experience. I've specialized in R&D and finding practical solutions to sometimes very complex problems. I use this skill set with 3D printing to create useful items for the home and beyond!