Box cutter holder

Box cutters are $3, so I'm not about to use a homemade plastic box cutter, but I will use a homemade plastic box cutter holder!

I realize the print quality in the photo is junk. I'm having trouble with certain filaments and the safe mode is to print at top of the temperature range. Pick your poison right? So no need to mention it unless you have good advice that you suspect I don't know. Thanks in advance.

I've included the RSDOC file in case you want to edit; the screw holes are a lit