Hmm I didn't fan dry it, just air dried.  Honestly I have a little trouble telling the smell of the naptha from the smell of the spice...the naptha smell is definitely obvious at first, but even after a week it smells...similar. But much less pungent and obviously naptha like.  I mean I'm not dead or sickly so I think I'm probably fine...will add a fan in the future.

So far I've just eyeballed it on a dab tool and used a dab rig.  How do you even measure milligrams of something so sticky?  My most precise scale goes down to tenths of grams. Decigrams I suppose.  I can't picture how one would be able to measure 50mg or whatever and then get all 50 mg back off the scale to whatever ingestion device...perhaps I'm looking at it from the wrong angle.  And I have yet to delve into figuring out what changa/enhanced leaf are. Noob alert