Remix I made a while back for my own printer. This simply moves the spring inside of the cutter and combines the body into one piece. Because the body is one piece I designed in supports. These should be easily removable through the filament path, and by using the same #11 blade to “scrape out" the thin disc where the blade will move. I included one body that uses m3 heat insets and one without. The “lid" is untested, I don't use this in my design. Given the nature of this kind of item customization will probably be necessary, and this just to give you a head start. Most pen sized springs should work fine.
The author remixed this model.
Moved spring inside of cutter, and simplified design.