I have purchased a G30 and I am building 5 gal recipes on the GF site from the kit instructions so I can brew them using the phone app. I switched the units over to US Standard. I have gotten FG numbers that are well below 1.000 and ABV numbers as high as 37%. This is from 10 - 11 lb grain bills and 75% estimated mash efficiency. I'm picking grain types from the list supplied in the app and sometimes I have to just get as close as possible because the descriptions in the instructions can be more generic than the choices offered, but that shouldn't throw the calculations off that much. I've sent a wtf? email to GF support. Anybody else have this happen? I've seen a few other public recipes on the website that have ABV numbers that look too high, but not as bad as some of mine.