The problem is that with tinctures, you have to use a large volume of solvent to dissolve the THC completely, and then let it evaporate down to a concentration that you want.
or so I understand... it'll be a great experiment though.
I have done it that way too The solvent is usually put in with a large amount of plant material then strained and dangerously evaporated. I have found dry ice extraction to be extremely easy and safe. My finest bag should produce a disolvable kief. This way I can also control the dose and theoretically make it "to taste" ... just thinking out loud but when I start thinking it usually happens so I will report