As Tat said the 91% is fine, as its just more water to evaporate out.
Instead of trying to pull your goodies out of the Changa, why not just add more DMT to the mix? Warm some IPA, mix in the DMT, then mix that with the weak Changa and wait to dry.
Depending on the ratio DMT/Harmalas/Herb, you could add DMT to make as strong as you like.
I once had a batch of Changa I wished was a little stronger, I would just measure my desired amount of crystal and sandwich it between the weak Changa as a boost. Works like a charm.
Ha ha
Save ya the trouble of redoing the Changa mix. Next time you know to make it stronger.
I agree that the 1:1:1 Ratio, Herb/DMT/Harmalas is then way to go.
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