Piper Jaffray analyst Troy Jensen upgraded voxeljet (VJET) to Overweight calling the recent pullback in shares a good buying opportunity. Jenson expresses "high conviction" that demand for voxeljet systems and services will remain strong. He expects the company "solid" Q2 results and keeps a $9.40 price target for shares. The Germany-based 3D printer manufacturer closed yesterday down 20c to $6.14. The analyst is less bullish on shares of 3D Systems (DDD) and Stratasys (SSYS). After surveying participants in the 3D printing industry, Jensen continues to believe expectations are too high for both 3D Systems (DDD) and Stratasys (SSYS).