OK, so the Hawk Sauce has steeped for a little over a week. It is 50/50 with 0mg nic (It was a freebie and my SO vapes 0mg). I love the berry with the cool finish. Slightly sour, but I think that is more from the berry flavor than any actual sour flavoring. I'm not sure if it would be an ADV, but I did mix it with some Sour Melon (50/50, 18mg nic) at about 75% Sour Melon and 25% Hawk Sauce, and the flavors complemented each other very well. In fact, it is now in regular rotation with my Brandy/Sweet Cream mix.
FYI- I use 0mg nic juice to cut my 18mg juice as I step down my nic intake, so I always have some 0mg nic juice in various flavors around for that purpose.