While we are on the subject of these "mist" kits, I have a question/observation. These kits use a wide variety of base grapes yet they all seem to finish out around 6 to 7% ABV. I can only think of a couple of reasons for this: 1) The grapes are early harvest (low brix), or 2) The concentrate does not produce a "full" must. By this I mean that after adding your water you do not arrive at a brix level equivalent to the grape at harvest.
Since these kits are typically 6 or 7L, it seems the latter is true. That is why the wine (absent the f-pack) tends to be very light bodied, even flabby in my experience. It seems the f-pack enhances this with the extra flavor and sweetness and also contributes to the early drinkedness (new word?) of these kits.
I am not bashing Mist kits; as you can see from my sig line I am actively participating in this market segment and enjoying the ride. I only bring this forward since we have Joe's attention. I am curious, Joe, if you have any advice to add body to these sorts of kits? I know you can't really add back what isn't there to begin with, but I have read some pretty good out of the box ideas of yours in other threads. No harm in asking, right?