Hi there. A while back i got a cheep-o DIY 3d printer from china that doesn't even work. So its been sitting in my office for almost a year now collecting dust. But recently I decided to repurpose it as a CNC machine since it has most of the parts ill need like tracks and stepper motors. I decided to control it using a GRBL shield and an Arduino. However Im still missing the most important part, the drill. I honestly have no clue where to even look for one. I have a Dremel at home but I have no clue how Im gonna control its speed. Where can I either find a cheep drill that I can control or is there a way to control my Dremel?