3D printing struggles to enter mainstream By: CNBC.com News February 03, 2015 at 14:42 PM EST Shares of Stratasys plunged more than 33 percent Tuesday after the 3D printer manufacturer cut its fiscal 2014 and projected 2015 guidance. Read More >> Related Stocks: 3D Systems Corp Apple Stratasys Ltd Tesla, Inc. Voxeljet Ag ADR