As Stratasys (NASDAQ:SSYS) and 3D Systems (NYSEDD) have continued to show signs of struggle and with their stocks trading down, it's easy to wonder just what factors have led to these poor performances. Rick Twiggs, who runs his own consulting company, Unchained Thought, was able to provide 3DPrint.com with some insights on the recent performance of the 3D printing industry. From views following what happened in the early days of the 2D printing industry, Twiggs' insights provide deeper perspective on the place of large companies in a growing industry. Read about his thoughts in the full article: http://3dprint.com/64251/stratasys-3d-systems-sales/