MK2.5 RMU brackets are now available

Now you can attach your RMU MK3 unit to your MK2.5 printer.

A big thank you to Chris Riley for helping us test these brackets.

These brackets allow the RMU to remain in the exact same place as the MK3 printer frame and even use less hardware by utilizing existing hard points on the printer.

The MK2.5 upper bracket is very similar in design the the MK3 bracket just utilizing different holes as the ones used on the MK3 frame are not present on older models

The lower bracket was more difficult to design. It is not easy to clamp to a threaded rod when the load is trying to rotate around the rod. Eventually I settled on a design inspired by the PSU bracket by sandwiching the bracket between the M10 Left side nut and axis end with tabs holding the bracket level.

These brackets will be in all future software packets. If you have already purchased a copy, contact us with your order number and we will get a fresh download link for you.

facts about the RMU

  • SOLD IN 80 COUNTRIES
  • FREE UPGRADES
  • FREE ONLINE SUPPORT
  • TROUBLE FREE FILAMENT CHANGES
  • FOR PRUSA MK2.5S / MK3 /MK3S /MK3S+
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BF001: Completed printed buffer

We offer to produce and supply the complete RMU-Mk3. The total print time is nearly three days which some people may find onerous. The complete kit comes supplied with all the fittings pre-assembled so all you have to do is attach the top, base and the brackets and Teflon tubes.


You will receive all the component parts of the RMU-Mk3 plus a bill of materials, links to assembly instructions, tips and tricks and any other resources we think you might find useful.