Fridge Temperature controller enclosure w/ rear outlets

I converted a chest freezer into a fridge by adding a temperature controller. It uses about 90-95% less electricity than a regular upright refrigerator. I converted it for less than $20.

Here's a link (they use a much more expensive controller)
http://www.builditsolar.com/Projects/Conservation/FreezerConversion/FreezerConversion.htm

This printed part allows me to do it without making any permanent changes to the freezer, (besides the two holes in the lid where it mounts). The fridge plugs into the outlet at the back of the box, and in the front is the digital display.
It uses the STC-1000 digital temperature controller, I bought mine from ebay, now they are about $10-15 USD.
The outlet in the rear is this: ($1 USD)
Cooper Wiring Devices 125-Volt 15-Amp White Duplex Electrical Outlet
link: http://www.lowes.com/pd_70684-334-270W-SP-L_1z0yt2jZ1z10xli__?productId=1098367&pl=1

I've used this for years without issue, so the more expensive controller is not necessary. I