I realize this build was a few years ago, but can you tell me if the magnetic strips used to attach the foam box to the fridge worked out? My garage will get pretty hot in the summer, so I am concerned about air leakage, but I want to salvage the fridge for potential kegerator at some point in the future. I'd rather a temp box such as this, rather than the typical screw-collar-to-fridge type of modifications.
Also, I was thinking of leaving the door attached to the fridge, just fitting a piece of foam board (with magnetic strips) to fill the gap between the fridge and the 90 degree open door. That gap on my fridge stays at about 1" throughout the swing of the door, so I think this would work.
Thoughts? Any guidance is appreciated, your setup is great.