Hey @Yooper I've got some weird preboil and mash percentages this evening on brew session. To tell you the truth it's all been a bit scuewiff lately things arnt lining up. I'll post some screen shots as I'm a little piddled atm after brewing. What do they say pictures say a thousand words well hope mine amount to 50. There's the overview. This is more normal and gravities/volumes. See this pic well it asks volume I put 51 Then there is another blank.box next to it well out 51 again if left in done well no percentage comes up in overview. Anyhow things ain't right might be me this my first double batch.