I upgraded my beer smith yesterday. I noticed the OGs of my extract beers have changed, I figured out it was due trub loss now affecting the OG but here's the thing I top off in the kettle to the batch size and take a reading before any losses occur, this make much more sense than adjusting gravity to losses that vary batch to batch, ex IIPA with a pound of hops vs a Mild ale. Of coarse replacing a portion of wort with water would lower the OG. . My hydrometer readings matched the old numbers not the new ones. I did try setting the trub loss to zero which returned the OGs to where they were but then noticed that changed the SRM. If I have a solution of sugars, say 5 gallons of 1.050 wort what matters is that ingredients yielded a solution of 1.050 wort not that I may end up with 4.87 gallons of 1.050 wort in the fermenter.