In Germany (and probably other countries, I haven't checked) you're not allowed to everyday carry a knife with a locking blade that can be opened with one hand (WaffG § 42a Abs. 1 Nr. 3).
This modification replaces a spacer ring and adds a latch that holds the blade shut. With it installed you need one hand to bend the latch out of the way and another one to rotate out the knife blade.
Printing instructions: Print it with 0.2mm Layer height (or lower) while standing up with support everywhere.
Assembly:
Unscrew the screw that holds the left-hand part together with a Torx T10H screwdriver (if the other side rotates with it, use another Torx T10H to hold it in place. A Torx T9H also worked for me)
Pay attention to only remove the screw on the front. If you remove the bolt with the internal thread on the backside too, some of the tools on the inside might fall out.
Take out the spacer ring. If you pull the outer plate outwards a bit, it will just fall out.
Slot the 3D-Printed mod piece into place. The screw-hole is a bit tighter than on the spacer, but it should still fit.
Screw everything back together. Make sure it's tight enough for the tools on the inside to not flop around but not so tight that you crack the 3D-printed part.
Dekkia
