This dremel 4250 holder could be screwed on the DIY CNC - Dremel CNC Remix ( https://www.printables.com/model/129795-3d-printed-diy-cnc-dremel-cnc-remix)
Two holes allow you to add a Velcro closure for better support.
The gear is a test with MDF.
The author marked this model as their own original creation.