Create the beer supply storage. The storage consist of vertical front and rear plexiglass walls secured to horizontal shelves. Cut the width of the shelves slightly larger than the length of the beer can. Angle the shelves to allow the beer to roll along the shelf. Add additional shelves for added beer variety.
Cut a small slit at the dispensing end of each angled supply shelf to allow for the servo that will retain and dispense the beers. Secure a servo to each shelf by gluing it to the bottom of the shelf so that one arm of the servo protrudes through the slit in the shelf.
Align the beer supply storage within the fridge and cut a vending hole through the side of the fridge insulation to allow the beer to exit the interior of the fridge. Take care not to cut through the copper refrigeration piping that may be present within the fridge wall.