I love using Promash but one thing that bugs me is that I cant simply input percentages of each grain then set the SG and have the program figure out how many pounds of each grain to use. I end up calculating this out by hand using the method in Ray Daniels Designing Great Beers. Ex. SG 1.060 total gravity points for a 6 gallon batch would be 360 (6 x 60), then use take your % you want say 80% base malt (360 x .80) = 288. Potential extraction of american 2 row in promash is 1.036 multiply by efficiency (36 x .75) = 27. Points needed from base malt/corrected extract efficiency (288/27)= 10.67 lbs of grain needed. When I follow this method for all my grains the percentages in promash are different than those I calculated. Any ideas on why this is?