My grinding
I have been working with wood for more than thirty years. Basically this is something voluminous. And for polishing, I use my own unit, consisting of a power supply unit, an aircraft engine DPR and a foot power button. A motor with a collet chuck clamps a snap, on one side a groove of 3 mm, and on the other a hole with M3 thread. A rubber circle is attached to this hole with a screw, along with sanding paper, which is trimmed slightly larger than the rubber circle. This design allows you to grind almost any, including complex surfaces.