Dummy Knife - Square

If there's one takeaway I got from our last Nerf game meetup, it's that we need way more dummy knives. I could always just buy some, but when you have a printer you feel tempted to just make something. And when I'm tempted to make something, I'm tempted to make something odd...

I was really into Tsutomu Nihei for a while, and he had some funny ideas for weapon designs. Trying for something like that with a blade that's too square.

EDIT01: I'm including a cutting template in case anyone wan