Miles and miles of elderberries, must drive you crazy knowing you cant pick them all!! I have never pressed the whole heads, I think that if you did you would get too much stuff from the stems coming out, and doing it this way there isnt much of a way to pick out the unripe, the not ripe but looks ripe from the ripe berries. You will soon be posting a new thread, "how do I clean this green gunk out of my primary". I got a webpage with some different ways to harvest them, my favorite right now is to clip the heads off, then shake and knock them against the sides of a 5 gallon bucket, when its got a lot of berries in it we run some cold tap water over them and gently stir and the bugs and most of t he green and underipe berries float up and out of the bucket, we strain them and stick them in the freezer until we are ready to make wine. I have no idea on the safety of just using KMeta, but I have a feeling that doing it that way wont kill everything and while you are waiting to get enough to make wine something will start to grow, maybe.
Crackedcork