You will not have any problems with the regualtors inside the fridge, they are used inside coolers all the time in commercial application. You should keep you gas tank outside of the unit however, the temp diference will make it so you get less gas from the tank and your high pressure gauge will not be as useful because it will read lower from the get go. Be careful when you drill because you do not want to hit any cooling lines runing through the unit. If you you use the right size drill bit you will not experience any major insualtive loss.
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