There are 2 advantages to having the port in my doghouse:
1. My phone usually rests on top of the doghouse while I'm driving so the wire doesn't need to stretch across the cab from the dash creating clutter.
2. It is very easy to tap into the hot lead from the horn relay, or other power source, to power the plug... and the dog house is already grounded so the ground ring doesn't need a wire.
I made it at Tech Shop where I first discovered the beauty of the Step Bit . http://www.techshop.ws/
They have a fantastic collection of useful tools. Here's what you will need
0. Auto Powerport / Cigarette Lighter Assembly
1. Step Bit
2. Power Drill
3. Soldering Iron & Solder
4. 14 - 18 Gauge wire
Lets get started...