A SciFi Scanner/Ray Gun movie prop

Step 5 Drill control holes

start by lining up all your controls (potentiometers, switches, indicator LEDs etc.) to where you want them to go on your pipe and putting dots on the paint with your sharpie. then with your calipers measure the part of your control that will hold the control in the wall of the pipe (see pic 3). then find the appropriate drill bit. you will probably want to put your control in a vice, but if you don't have one just go slow and the drill bit shouldn't grab the pipe and swing it around (but then again i had a drill press).