I have a cheap Chinese Foredom. In my SR. It is of very little use. The pedal to adjust the rpm is bullcarp. We need another machine, a machine that allows you to adjust the revolutions. For our affairs, more than 2000 rpm is not needed. And this Foredom, in my opinion, has 20,000. Catching 1500 - 2000 rpm on it and then constantly holding this rotation speed is very problematic.