Ever since I started using Beer Smith a couple years ago, I have been frustrated with something: although I do a partial boil and compensate for gravity by adding only half of my malt extract pre-boil (with the rest just before flame-out), the software always gives me a high estimated PBG, as if I had added all the extract at the beginning of the boil. Is there any way to tell the software how much of my total grain bill I have added at the beginning?