3486+5=3491. Horrible efficiency... I think i am either losing enough wort in the HERMS coil and plumbing during step mashing to cause a problem, or my hydrometer calibration is off. what are your beers finishing at with the Notty? my first batch went 1.036-1.005. this one is on the same course. Still hitting the 4% ABV i guess, maybe it is the the hydrometer.