I haven't blended kits, but you're right the process is the same as anything else. That said, I would want to be sure the things go well together, like Grenache-syrah-mourvedre or the elements of a super Tuscan.I asked a question like this a couple of weeks ago and got no reply. Of course someone has done it. They had to have. But someone ain't talking. If you're like me what you're hoping to hear is either an emphatic yes or reasons why it's not a good idea. In principle, I don't know why it would be any different than making wine from grapes and blending. Of course you would want to do some trials.