I have one of these on its way. I want to get it installed when it arrives but don't know how to access and punch a hole in my gun safe to get an electrical cord in there. I seem to remember that my safe has a punch out on the upper corner on the back.
http://www.amazon.com/Peet-Dryer-M10-PEET-SafeKeeping/dp/B00486U71E/ref=sr_1_3?ie=UTF8&qid=1397760560&sr=8-3&keywords=peet+dryer
Do you just use a drill?
Should I fill in around the electrical cord with something after I punch it so it will retain some of its fire rating?
Would it be worth it to install a remote sensor hydrometer?
Wondering what others have done.