Piper Jaffray analyst Troy Jensen says he's "modestly more upbeat" on Stratasys given the pace of innovation and some of the new materials and systems coming to market. Potential catalysts for better system growth are the new metal technology or broader adoption in Aerospace, but both of these catalysts are likely events that will begin to boost the system growth in 2020, Jensen tells investors in a research note. 2019 could still be a challenging year for revenue growth, adds the analyst. He believes that until product growth accelerates, Stratasys shares will remain range-bound. As such, Jensen reiterates a Neutral rating on the name with a $19 price target.