Is there any reason not to use a 1 gallon kit with a smack pack then use the yeast cake for a full size beer? like a big starter with 6 bottles of beer as a bonus 
Not at all, I do this when I brew lagers only I’ll do a 2 gallon batch of lightly hopped low gravity beer, like around 1.035-40. I ferment it a little warmer than lager yeast temps to speed things up, it still comes out drinkable.
sounds like a perfect use for a one gallon kit
That was my thought and a great way to experiment with different beers and play with beersmith.
