Coelho, thanks for the reply!

Do you know if the isomerization process is due to heat alone, or does it need the acid? I already bake the herb a little bit to decarboxylize it before extracting it, and then there is some heat during the extraction too. Do you think your heating process is decarboxylizing left over THCA to THC? Or do you think it is isomerizing other less active cannabinoids into more active isomers of THC?

I might just have to try simmering with some lemon juice during the extraction and see what happens. As long as someone has done it before without actually destroying their green dragon, I'm willing to give it a shot and compare it to the batch I made without lemon juice. A controlled experiment! If I do it, I'll post results.

When you say heating the oil makes it more of a sativa-like, not so indica-like, do you mean a lighter, less sleepy high? I like the lighter kind of high with some psychedelic aspects, not so much the deep, stoney, out-of-it, sleepy kind of buzz. I still like a strong high, just not totally out of it. What kind of high do you get out of your heating process?

Thanks for the info.