I did my second AG today and went from a 1.056 pre boil gravity for 7 gal to a 1.067 final boil at 5.5 gal. Heres my breakdown = 35/7x15=75 56/75x100=74% eff. I am moving up in the AG world. I just wanted to gloat. I moved from 69% on my first batch to this , so Im stoked. I feel good.