I Dindt have silicon bars or anything like that to add to the base of the ball vice, so i decided to make one out of TPU
This is a TPU ring for Chris Borge's Open Ball Vice, not as gripy as maybe silicon bars but because of the weight of the ball works great!!
Ball Vice:
https://www.printables.com/model/823122-open-ball-v1-ball-vise-system
https://www.printables.com/model/842020-open-ball-xl-base/files
The author marked this model as their own original creation.