I made this kegerator to work with several configurations. I took out the inside of the door and replaced the door shelves with a flat panel. I have it set up for three full size kegs. One inside the kegerator and two can be set up behind in an ice bucket with CO2 and beer lines passing through pre-drilled holes in the side of the kegerator. I have two air tanks so I can use CO2 or CO2/Nitrogen mix for Guinness. I can keep the gas inside or outside mounted on the top with lines passing through the side. Inside I can easily fit one gas tank, one full size and a slim or three ponys. I have the parts for a thermostat but have not yet installed it.