I didn't want to look at my hookknife with the disdain and fear anymore.
So I designed a sleek sheath for it. Now I don't have to worry about it cutting up everything and/or getting dulled in the process.
I also wanted to challenge myself and model something, that others might benefit from as well. Sure, it would've been a whole lot easier and cooler to make a sheath from leather with a retaining strap and everything but I wanted to model something and use a magnet.
The biggest problem was getting the shape as close as possible to the blade. I drew the blades silhouette on finely squared paper and used those 2.5mm squares to help with the measurements. Luckily the hook-shape seems to be bent against a pipe-shaped object and it was relatively easy to find the center. From there I just added blade width and tolerances and put up the walls practically.
Hopefully a fellow maker finds this useful.
The magnet I used was 8mm in diameter and 3mm thick. The wall between the magnet and the thickest part of the blade is 0.8mm, so they stick quite nicely together.
After printing and cleaning it's time for magic!
Just press the 8mm x 3mm magnet in it's hole and you're done!