RostaP's wonderful multifunction arm mounting system includes two parts (one for the small arms and one for the full size arms) that connect your arm system to a clamp. Both parts have teeth (geared) to lock down the arm system. You can replace those parts with mine to allow the arm system to fully rotate.
Note that you will need to print two of the parts as they will spin/rotate against each other (two for the small arms and two for the full size arms). Also note that you cannot lock down the rotation because there are no teeth on the parts anymore. So you have to decide - do I want my arms to fully rotate on its base? If so, use my parts.
The author remixed this model.