Other Chassis for Luke Hero

Tutorial for KR ECO Hero (2022) Master Chassis

This hilt and chassis have been specifically designed to allow a fully removable core, with removable battery and Crystal Chamber, while still having the control box switch and arrow light work. A pretty smart design making it one of the best Luke Hero props made so far.



  • Disclaimer

    GOTH-3Designs cannot be held responsible for any mistakes made by DIYers during their install. You must have a good understanding of what you’re doing, of the components used and the safety measures associated to them. Always wear protective gear when working on install (gloves, eye protection, …), GOTH-3Designs cannot be held responsible in case of accident.

  • Note #1

    Always use the smallest wires to make your install easier. There can be big differences between one wire type and another for the same AWG specs. PTFE Wires with the smallest OD are recommended such as those sold at The Saber Armory. A good wire management is also required, routing wires properly helps a lot saving space.

  • Note #2

    These instructions will not cover how to wire the soundboard, make sure to learn how to by reading the manual. We have also typical soundboards wiring available in the Padawan Tutorials. Always test your install along the way! Verifying that everything works after important steps is better than having to dismount everything because something wasn’t wired properly.

  • Note #3

    3D printed parts can have very slight accuracy variations. In some rare cases, some sanding or hole deburring can be required. Additionally, metal parts can arrive a bit bent, but are normally easy to bend back into shape. Consult the FAQ if you encounter issues with parts that cannot be solved easily.

KR-Saber Assembly Instruction

Chapter 1 – Emitter Install

  • Cut the NPXL PCB holders from the main chassis.

    You can choose between 2 options:
    – the PCB holder is installed directly at the bottom of the emitter (left), which will allow to use any Neopixel blades.
    – the PCB holder is installed into the provided heatsink (right), which will need a blade with a recessed blade side PCB.

    1st option:

    2nd option

    Wire and install the blade side NPXL PCB into the holder, it goes at teh top of the hilt grenade section


    Glue the holder at the top of the grenade section:

    It is recommended to use thread locker on the emitter part to avoid accidental unscrewing while inserting / extracting the blade.

    Glue the hilt side NPXL PCB holder into the emitter

    Wire and glue the PCB into its holder

    Option 1 – given the PCB raise the blade plug, it will be necessary to cut it in order to sit flush again.

Chassis Install

  • Cut the 4mmOD tube, and glue it in the hilt as shown

    Cut the 1mmOD rod, and install the bottom cover with it

    It is also recommended to add glue as shown below, to reinforce the chassis.

    Then insert the rods and glue them as well

    Install the battery tabs, and kill switch

    Install the speaker

    Install the OLED screen

    Install the switch PCB

    Install the soundboard

    Install the single pixel

    Install the covers and crystal.
    Glue the crystal into the CC part and check the fitment is correct.

    Glue the magnets on the covers and chassis

    Cut the 1.5mmOD rods and check the fitment to glue them at the right length.

    Install the NPXL hilt side PCB into its holder at the top of the chassis

    Screw in the control box and add the switches plungers.
    It is then a matter to adjust the plungers screw length, so that they match the chassis perfectly. Too long, and they will prevent the chassis from sliding in. Too short and they will not actuate the switches.
    The control box card can also be sanded a bit to provide more depth to the plungers.