My brother and I brewed 11 gallons last night. Man, talk about pushing our 10 gallon igloo to the limit, but we got through it and had an amazing efficiency of 79%! This is our third all grain and as we dial in the process our efficiencies have been steadily increasing (70%, 73% and 79%). Due to the high efficiency, our OG is 1.067 and I hope this will not negatively impact the final result. Also, with the absolutely full mashtun, preheating and insulated lid, we lost less than 1 degree f during a 90 minute mash (154.4 to 153.8). I tasted the sample and it's good, but man is it hoppy!
I still have the questions from two posts up about dry hopping if someone will chime in. Thanks!