I have some aluminum building-set parts on hand and just got a second rotary tool, so I thought I’d try my hand at making a light-duty CNC mill—maybe carve up some cheap pine or make circuit boards.

[youtube=http://www.youtube.com/watch?v=Oc-9gTFj-y4&hl=en] I was considering a laser cross-hair for my mill and found this video of some great setup hacks that ...