This is my take on a simplistic gravity knife

There is no hardware needed

It works straight from the printbed

I have only printed it using PETG-CF because that is what I usually print with

Please tell me if something doesn't work so that i can fix it

Instructions:

I use 3 walls when printing

Only the blade needs support, I just use tree support in the hole and the cut out

I also made sure the seam is on the other side of the hole in the Shell part