Assembly Instructions

Retractable Management Unit - Assembly Instruction

The assembly instructions are ready for our first release of the RMU Mk3 Filament Buffer! Everything is going according to plan and we will meet our launch date of 23rd April.

You can get the instructions here: RMU-Mk3 Assembly Instructions. the instructions apply to all the variations that are available.

We wanted to make sure you get the most out of the RMU-Mk3 so you can get the instructions to build it here. If you have bought the unit pre-assembled then there are just a few screws to fit before you’re ready to go. 

The video can be seen here: Assembly Video

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.