Piper Jaffray analyst Troy Jensen lowered his price target for Stratasys to $19 saying the company reported "disappointing" Q1 results with product sales well below expectations. Competition is intensifying and Stratasys will likely struggle with product growth while relying exclusively on FDM and Polyjet technologies, Jensen tells investors in a post-earnings research note. He believes the Aerospace opportunity and new metal technology could provide some needed product growth for Stratasys, but notes this doesn't occur until 2020. The analyst reiterates a Neutral rating on the shares.