GVG or Bong. Swim is most familiar with freebase, but hopes to familiarize himself with fumarate soon. SWIM has indulged in one batch of changa many times but is still more familiar with freebase, though more partial to changa. If smoking freebase, SWIM prefers a small leaf bed of caapi, with another caapi leaf on top to sandwich it. Though mullien has proven to be efficient in reducing the harshness of the smoke in SWIMs experience.
Imho, go for changa out of a GVG