Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:2806631.

I reworked this file to incorporate a Foredom flex shaft size 30 handle. I also moved the screw holes out towards the edges and centered the arm hinge for more stability. I have included a step file as well.

Update*** Reworked the arm for a 50mm (2") cutting wheel. Smaller wheels would not reach the stock because of the 1" diameter of the Foredom handle.