This is my own design of a life-size Attack on Titan sword replica. The blade is detachable and is steadily held by a magnet lock. I'm quite satisfied with this one personally, but I find that there is still room for improvement, so this will most definately not be my last version.

PRINTER'S NOTES: scale everything down uniformly to approximately 90% (give or take a couple percent if you have bigger/smaller than average hands). In order to make one, you need to print five of the Blade mid.STL and one of all the other files. In addition to the 3D-printed parts, you will need a 4x785mm threaded steel rod (the blade core), a 4x36mm (threaded) rod (the lever axle), and two 5x5mm neodymium disc magnets (like these https://www.supermagnete.nl/eng/disc-magnets-neodymium/disc-magnet-diameter-5mm-height-5mm-neodymium-n45-nickel-plated_S-05-05-N).

Do note that if you scale it to anything else than 90%, the metal parts will not fit perfectly.

Assemble the blade by screwing the middle blade segments from the male connecting side to the female connecting side onto the blade core, followed by the blade base, and lastly slide and glue the blade top on the other end.

Assemble the grip by installing one of the magnets into the magnet pocket of either of the grip halves (as indicated with red on the second image), before glueing the two grip halves together. Install the other magnet in the magnet pocket of the blocker (as indicated with red on the third image), such that both magnets have identical poles facing outwards (they need to repulse eachother). Then slide the blocker into the blocker slot with the thin side facing the blade slot, before installing the lever with the lever axle.

If the magnet lock does not work smoothly, try sanding the contact surfaces of the moving parts.

Change log:

• On October 22nd 2017 a model flaw has been corrected. Any prints made prior to this point would be malfunctional and need to have the 'Blade base' replaced with the updated version of the 'Blade_base01.STL' file.
• On October 28th 2017 the two lower halves of the grip have been merged into one part.
• IMPORTANT: On October 30th 2017 a model flaw has been corrected, Any prints made prior to this point would need some post-print modifications. Apart from 'Blade_Top.STL' and 'Blade_Mid.STL' all files downloaded before this update will be incompatible with the current model.