Update: I've tweaked my numbers after: A) performing a few more brew sessions and B) doing a boil-off and kettle + chiller deadspace test. The new numbers helpled my session on Saturday be spot on (though a little different than GF's online calculators). Notably, the boil-off rate is now 2qt/hr instead of 1.6, and the kettle deadspace is increased to 2.75 qt to account for what is left over in the counterflow chiller. Fellow Brewers, After quite a few brew sessions with my Grainfather, I feel that I have dialed in my equipment profile. My primary goal with the profile was to get the resulting volumes to match up as close as possible with the numbers that come out of Grainfather's own online calculators -- when I used their calculators, my brews came out as expected, when I didn't it was a total crap shoot. I have yet to find a definitive answer on an equipment profile for the Grainfather as GF doesn't really post a lot of the information necessary, similar profiles in other software are wildly off, and people have different ideas as what they should be (including me!) That said, I have attached a screenshot of my profile settings -- please keep in mind that these work for me and shouldn't be misconstrued as "official" by any means. Other info: This profile is for the US/110v version I use the qt/(oz|lb) version for the entries rather than the L/(g|kg) I fly sparge My default batch size is 5.5 gal My default boil size is 7.4 gal As an aside, I do have to say I have grown rather fond of the GF. It is far from perfect, but my brew days have gotten easier and the results more consistent. Cheers and good luck!