Piper Jaffray's 3D printing survey 'once again discouraging' Piper Jaffray analyst Troy Jensen says his firm's survey of 73 3D printing resellers was "once again discouraging" with the number of below plan responses out numbering above plan responses in Q3. On the positive side, the analyst saw a sequential improvement from the Q2 survey results for Stratasys (SSYS) system demand. On the negative side, the analyst says 3D Systems (DDD) system demand appears to have "remained challenged" in Q3. Channel checks point to demand for Stratasys' products beginning to reaccelerate, Jensen tells investors in a post-survey research note. However, his channel works points to continued "unhappy channel partners and system quality issues" for 3D Systems. The company has a long way to go until these issues will be fully resolved, he cautions. Jensen has Overweight ratings on Stratasys, voxeljet (VJET) and Materialise (MTLS), and a Neutral rating on 3D Systems.