I have a 36qt cooler that I've been mashing in for 2 years, and I only do 5 gallon batches. I'm going to be brewing over the weekend with a bunch of friends and one of the brews will be a ten gallon batch. The guy putting on the brewday has a 48qt. mash tun. Does anyone out there have experience using 22lbs of grain in a 48qt cooler? It seems to me like it could work if we go with 1.25qts/lb. Ideas?