AutoCAD diagram

Yes, I do tend to draw a little "loose" usually, but I can work very technically when I need to. For instance, here's a drawing that I recently did using AutoCAD to send to a book manufacturer. See, I need to be 100% sure that they know how to build the slipcase, so I made these fool proof instructions using vectors, angles, math (which also included geometry), a ruler, and science:

(yes, I actually did send this).