Dremel Drill hold down.

thingiverse

this is a remix of a remix you can place an M3 hex head screw through the top. The bottom half contains a space for a M3 nut to catch the screw. This way you can move and tighten the foot at your leisure and also place them at an angle more suitable for the work piece. Square nuts work best, but hex nuts are passable if you don't over-torque them. Use at your own risk. Thanks https://www.thingiverse.com/ejohnfel for stating it.