I think the whole point of doing the AB or STB extractions is to isolate the pure DMT from all the plant fats etc. When you just extract the DMT in to water - or alcohol in your case - you are pulling everything out of the plant which is soluble in that solvent. That will leave you with just a resin or goo, which would be extremely harsh to smoke.
Of course, since you are taking it orally then none of this matters. Water works in ayahuasca because of the heat involved in the brewing process. There is no reason why alcohol wouldn't work if you were able to heat it to just under it's boiling point, and maintain that for the length of time you would normally brew it. But it would taste ghastly, and you would be significantly inebriated from the alcohol, which would impact the experience and possibly make it far more nauseous and unpleasant than it would with water.
I definitely wouldn't want to take alcohol with ayahuasca.
Mandelbrot said:
So it's your choice: are you a shaman or 'just' a westerner?
Oh please. Enough with the whole 'shame of being a westerner' crap. Every culture has it's ways of doing things. It is what it is. There is no "disrespecting mother nature" in the way you prepare the plant to imbibe. The only disrespect is in regards to yourself, if you happen to make a toxic preparation which is harsh to your body. But neither method is "correct" or intended by nature.