Good News for Ultimaker 2 Owners: New Extrusion Upgrade Kit Lets You Turn Your Older Printer Into an Ultimaker 2+ - 3DPrint.com | The Voice of 3D Printing / Additive Manufacturing
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DXU - Efficient Dual Extrusion Upgrade for UM2+ - Page 2 - Third party products & modifications - UltiMaker Community of 3D Printing Experts