Thanks Bear. I will give that a try first. The only thing that could possibly suck is if it doesn't burn well inside and I need to cut the holes later after the cement board is installed and have to deal with the insulation in the walls. Its a big cabinet and honestly I have had my
AMNPS in my little MES30 and my propane GOSM without the mail box mod and have never had a problem. With that being said, it wont be that huge of a deal I guess.. I actually thought about putting two small CPU fans at the intake and exhaust that I could control via speed dial if I need to get more air flowing. There are lots of options I just think that a mailbox will look like crap on my "outhouse" as my daughter calls it.
Jim