I'll stick with my Jack in the Black as it comes out of its square bottle. Motlow and them put much effort back in postwar Tennessee to come up with this stuff as it is. I count myself fortunate to be able to mix up instant coffee without poisoning myself, so trying to fiddle with JD... pass.

Good experimental effort, though, and yes, Mythbusters did the filtration shtick with vodka, but they used fresh filters, IIRC, and up to ten passes (not ten passes through the same filter, though; a fresh filter each time) and had pros taste test in the blind. Don't remember the outcome; likely it's on their site.