We’ve been having a good old time with this over on the Pocket Knife community, but I figure there’s probably a lot of crossover with this crowd as well.
I’m sure you’ve seen various clever little one piece utility knife blade holders on Thingiverse and so forth, and while they’re quite functional I don’t think they’re nearly as overwrought or silly enough, nor require quite enough components.
Rather than repeat my entire post from there over here, I’ll leave you with these:
Link to .STL Files And Assembly Instructions
If you read their ToC, that entails giving them rights to basically do whatever they want with your creations, including redistributing them without your permission. They also force you to tacitly declare that your models are released under Creative Commons. No thanks.
Plus, various people with pants on their head around the world get really cagey about balisong knives for some reason. Like they think they’re super dangerous sentient objects capable of acting on their own above and beyond other types of folding knife. I’d rather not have anyone on there shrieking “think of the children!” at me because I designed a silly knife.