Rheslip made his own CNC machine – “I looked at a bunch of designs and decided to try a fairly simple 3 axis machine as my first effort. The idea was to use a Dremel tool for the cutting head and use the machine to engrave aluminum front panels for my guitar amps. As it turned out the machine isn’t accurate or rigid enough for that. A dremel just has too much slop in the bearings for accurate machining. The machine will do a reasonable job machining soft materials like plastic and soft woods, and it does quite a good job of plotting PCBs. I haven’t tried drilling PCBs yet but I’m pretty sure it’ll handle that too.” Thanks Star! Link.