Ok, so the recipe is for a Samuel Smith's Winter Welcome clone as found in "Clone Brews". The extract recipe calls for 1.5oz. of EKG's @ 4.2 AA which is 6.4 HBU's. I know how to calculate the HBU's, amount of hops time's the AA=HBU. HOWEVER, the all grain recipe call's for 4.5 HBU's of EKG for...