So tomorrow is my first all grain and I was playing around on beersmith. I will be making the rogue dead guy ale clone and it calls for 12.5lbs of grain. Ive been reading that you want to shoot for a 3-4 gallon sparge but on beersmith it says I can only do a 1.8/2gallon sparge. I only have an 8 gallon brewpot so I cant really go any higher than a 2 gallon sparge. Will this be enough? Or will my efficiency drastically suffer?