The recipe I did today had an OG of 1.081 and Beer Smith was dead on when I initially entered the recipe. But when I took a reading during the boil, I was low so I needed to add DME. If I just added more DME in the recipe section of Beer Smith it would have said the OG was higher than 1.081 but it really wouldn't have been; so I don't think that will work.
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"Women and wine, game and deceit, make the wealth small and the wants great."
-That famous kite guy