After surveying 30 resellers in the 3D printing space, Jefferies analyst Jason North cut his price target for 3D Systems (DDD) to $14 from $22 and Stratasys (SSYS) to $50 from $60. A key investor discussion is when or if the industry will return to 20% growth, North writes in a research note. His survey indicates Q4 as the most likely time frame for Stratasys and later, if ever, for 3D Systems. The survey suggests weak Q2 results and a "muted" rebound in Q3, North tells investors. He prefers shares of Arcam (AMAVF) and Stratasys, both of which are Buy rated, to Hold-rated 3D Systems and Proto Labs (PRLB).