Also, since I can't fit 40lbs of grain in my 10 gal mash tun, planning to do 2 mashes back to back, each one producing 3.5gal of 1.1ish grav wort, 7gal boil and at the end of it have 5.9gal into the fermenter. Then through fermentation, slowly add up to 10lbs dextrose to simulate og of 1.2+