The initial test was done with the 10x enhanced passion flower because on it's own, that leaf was not introducing enough harmala effects (when used in small amounts, perhaps a whole joint may have worked).
So, impure harmala could potentially also infuse cleanly into leaf without becoming sticky goo (using acetone) if you evaporated very very slowly (or used a slower evaporating solvent per soulfood's suggestion). Ethanol will be tested in the future with impure rue extract.
PS: Could you consider adding a small warning to your initial post regarding potential contraindication of harmala ingestion with recreational and pharmaceutical SSRIs, stimulants, and MAOIs? Changa makes everything very convenient and it wouldn't be good for someone to accidentally offer some to someone at a party who may be taking prescription Zoloft or Ritalin (or worse might be rolling or tweaking). Although most changa probably has minimal haramalas, it's still best to be cautious and knowledgeable. Educated, safe use should always be promoted.