My brew buddy & I currently brew AG in our 15 gal system...use HERMS setup between our MT & another pot/HLT...we also essentially batch sparge & have enjoyed high yields thus far...he has heard about wort grants & wants to implement, I'm not seeing the merits & tend to subscribe to the KISS principle....I could see the point if we were fly sparging, but we abandoned that long ago for time sake & low cost of xtra grain needed to batch sparge...am I missing something here ?