Just to add a quick report; yesterday I dropped 15 drops therapeutic grade elemi into my mouth, around 4:30 PM.  I was still feeling the after-effects of the previous day's Peruvian Torch + Caapi beverage, but within an hour the elemi oil took effect.  The effects came on rather quickly, and lasted approximately 2 hours, then subsided as quickly and subtly as they arrived.  The strongest moment came during a yoga class, when I looked out the window at a tree, swaying in the wind and digging the brilliant sunshine.  I felt connected with the tree, on a mental level, from the inside - almost as if my mind had expanded well outside of my body, and became inside the tree as well as inside of me.  This feeling is hard to describe but I've consistently felt it with cactus drink as well. 

There was a distinct difference between this feeling and the one of mescaline + Torch alkaloids.  With mescaline/Torch I'm overcome with the "beauty of the suchness of being", to paraphrase Dr. Shulgin's description.  With the elemi oil the connection with the trees and flowers was very intellectual, as if I could feel, from the inside, the computer-like mental processes holding them together.  In PIHKAL (or perhaps an interview) Dr. Shulgin described the effects of one of his creations in exactly this way, only much more precisely.  Unfortunately, despite a lenghty search of the pages of PIHKAL, I can't find the passage which so perfectly the describes the distinction between the effects of mescaline/Torch and this.  There was also a speedy, amphetamine-like tinge to the mental effects of the elemi oil, reminiscent of a similar effect of 2C-B but something I haven't felt with mescaline/Torch.

On Saturday I'll be trying the elemi oil once more, this time with probably 23 drops mixed into a small amount of Blue Agave Nectar.  Cheers for the suggestions everyone, and sorry I can't contribute to the chemistry side of the investigation.