So we've all seen this video:

http://video.google.com/videoplay?docid=-2164471661630252647&q=mescaline+extraciton&total=1&start=0&num=10&so=0&type=search&plindex=0

My question is, as far as I can find, it's impossible to find any, especially quality dried san pedro skins. The only thing most people in the US can find is live cuttings. As far as I know, 18 inches of live cacti is enough for a good trip, however, I need to do an extraction for various reasons.

My question is, can live cuttings be substituted for 400g of dry skins, if so how many inches. OR, would it be better to skin the live cuttings, and allow them to dry, then proceed, again any help on the lenght of san pedro needed, or any other methods that may work better. Of course this is all theoretical, and I won't be doing this, being illegal and all, just curious...