In January, Ultimaker released the new, improved version of the Ultimaker 2. The Ultimaker 2+ came with several upgrades including interchangeable nozzles, an optimized air flow feature, and a geared feeder that prevents skipping and makes changing filament and filament pressure much easier. Now, the company has introduced an upgrade kit that enables owners of ordinary Ultimaker 2 printers to add all of the new features themselves, turning their printers into 2+ models. Read more at 3DPrint.com: http://3dprint.com/123821/ultimaker-extrusion-upgrade/