What is the roof vent up front for? To me, that looks like a 'normal' fridge "out" vent?? The thing just below on the side of it up front has me baffled as well??
But, what you did with those in/out vents on the side is very "cool" indeed! :)
Were you running the fridge on gas or elect when it got that hot in the day?
I ask because I run my fridge 100% of the time on gas, just because it cools so much better and I'm able to keep it between 38-40* even of the hottest of days and opening it a lot to get my beer thru the day.. ;)
When I run it on electric in the same temps and such, it'll get to 45 and take forever to recover...
Oh, and even thou I'm in the NW, I camp a lot on the EAST side of the mountain and it gets very hot over there... ;)
Good luck!
Mitch