I don't know how many of you have bought salvia tinctures in the past but general opinion is that they weren't worth the money. And their are better means of experiencing salvia, without burning your mouth for threshold effects ect. Anyway I don't know how much Salvinorin-A is in a tincture or dropper full, ect. But while making changa I poured enough of a salvia tincture over it to wet it all. Now when smoked the changa is much more visual. Smoked after coming down from mescaline and wow. FYI my tinctures are a bit old as well (a year or 2). Never put them in a fridge or anything. But still have potency.

This is one of the way to use your tincture it's true, or recycling it as you mentionned in changa.
However, I had some of the playful breakthrough with salvia tincture.
I'm not sensible to them these days, but still add salvia to my changa blends, and it's a nice admixture !
I have actually a few homemade tinctures (inexpensive) and one salvinorin crystal ethanol tincture 1mg/ml, which is the best tincture to dose with changa ( adding exactly 1mg salvinorin alpha per gram of changa blend).

swim finds it hard to follow two leaders...

From what I've read, it seems just as good to just "chew" the leaves.

and chewing the leaves doesnt burn the hell out of your mouth either yikes!