Ultimaker 2+ - Recommended New Parts Before Selling in Ultimaker 3D printers Posted October 27, 2018 · Edited October 27, 2018 by Anders Olsson It depends how many printing hours you have on the machine? If it has been operating more or less 24/7 (some of them actually do), you could consider replacing the timing belts, there is a kit for that. If the printer only has a few thousand operating hours though I think it will be fine with what you suggested. Pay extra attention to carefully cleaning and re-lubricating the Z-screw with the right type of lubricant as that probably is the most critical component for maintaining good printing quality. The feeder should´t need any attention unless you have been printing abrasive materials?