Ive used cebil seeds, Anadenanthera peregrina five times as a snuff. Ive done it in various ways, once with snail shell ash, twice with bicarbonate of soda and twice just as it comes. The intensity of the trip did not seam to be affected in any way with those add mixtures. I found drinking lots of alchol before hand enhances the visions considerably and makes for a better experiance, probly deadens the pain of such large amounts of plant material up your nose. The five trips have all been rather unpleasant due to it being drop you to the floor and writhe in agony and painfull. Yes, Ive had great visions, seen some incredible things but I dont need all that crap in my sinuses. It is alot of snuff that has to go up, I dont like it to the point Ill never do it again. But I would love some free base crystals. I was thinking about AB extracting from virola resin, which apparantly contains %8 tryptamines and was hoping to find somone with that kind of specific knowledge. Now however, if I could find this stuff for sale it would save me alot of time and efort and to this end have spent many an hour searching the net looking for just such a vendor, without succsess.