Yes, I am interested in doing the vodka extraction and then lime precipitation (although I would not heat the vodka and just allow it to soak for an extended time, for safety reasons). Here’s a list of experiments I might do at some point:

• Re-x the residue of an alcohol extraction
• Your lime precipitation idea
• I found out the stupid way that alcohol doesn’t freeze. But I was thinking of redissolving the residue after evaporation in plain water and simply freeze/thaw multiple times for tannin removal. Don’t remember the thread but I believe Sabnock stated he arrives at a brew that almost looks like plain water by freeze/thawing his water brews.