This last weekend I missed my preboil gravity by quite a bit. The main reason is I changed a value in Beer Smith for some reason and didn't change it back before brew day I always do a gravity check of my final runnings, and it was 1030 so I know I have plenty of sugar left in the mash. I also have 9lb of DME sitting here that I could have used. So the question is..
1. If I want to do just run of more wort and boil longer, how can I figure out how much more to run off?
2. If I use DME how do i figure out how much to add?
I have Beer Smith if that helps. Thanks for any help/advice on this.