So here is my scenario.. 15gal batch so i am for 16.5 in the fermenter when i plan on a big dry hop, i build a 4000ml starter using all the typical calculators to get proper yeast cells .. thats simple. now say i came up a little short on my volume in the fermenter and rather then lose the volume i have basically a gallon of wort in the starter. so if im at 16gal of 1.074 wort and want to had half of the total starter instead of decanting off the entire thing to bring up my volume is there a way to factor that into my gravity readings to get a more accurate ABV? so 16gal at 1.074 + .5gal of 1.010 = 16.5gal of 1.0??? sure i could pull a sample after the starter is mixed in and before fermentation kicks off but i guess im looking to find a number before it happens so i can decide which i prefer, the abv loss or the volume loss.