OTF Fidget Knife mk II + CAD

This is my take on the brilliantly designed OTF Fidget knife by Uhltimate.

I reversed engineered the files and made some mods. Only 5 printed parts, no hardware, a single drop of glue and two small sections of filament.

Tell me what you think.

Changes are:

- 75 deg hook angle for better blade retention and click action.
- an exterior shell to minimize finger & palm drag on spring.
- a flat face thumb slide for easier deployment and pocket-ability.
- easy glue thumb tab (no hardware)
- use of snap fit for outer shell retention and/or filament as hot swaged pins for permanent fixation.

Suggested to use stiffer filament for main body (PLA or CF-ABS) and something with a bit of give for the outer shell (PETG).
Use a single drop of glue to affix the thumb tab in the slot. I printed mine in ABS so I used acetone to weld it.
If you use the filament sections to hold everything together, just ream out the holes with a 2mm drill bit and heat a small metal objec