




The only difference in the two are the button sizes. The red one I call the Heat Seaker has a 12mm button and the black one, The Sarge, has a 19mm.
I decided to put the pot inside the box for two reasons. I like the clean look of the box without it on the outside and I like taking the back off and playing around with it. I am a very fidgety human being. The voltmeter does batt. life and volts to the 510. Both boxes are amazing and thanks to this forum and a few how to videos I have them.