One of the most common questions I receive is: where can I find the Ultimaker S5/S3 maintenance kit? However, having built, QCed, and done technical support for Ultimaker printers for the last 7 years, I can tell you what I would put in an S-Line maintenance kit if I were building it. The parts are all available separately, and you can use this guide to put together a kit that will best suit your needs.Â