I actually got that igloo free! The folks I was doing a renovation for were going to throw it out and asked me if I wanted it!! Well, in no time, I had it converted in a nice coolerdor for storing boxes! I got the digital hygro from cigarbid for about $20. It was a perfect 65%/ 70 degrees F. after sitting for 4 hours! Made the shelf out of 3/8 dress plywood, which I cut on my bandsaw!
This is the way to go!