[Tool] Friction pin connector/cutout

One of the things I've admired about the Ozo 123 Puzzle bear, apart from the genius of it all, is the connector pin.
It's simple, it works, and best of all, it's easy to print (compared to for example the lego technic/mindstorms connector).

So I've tried to extract the necessary holing to be able to use the pin in other designs.

I have done a few tests and it looks fine, but there should be a way to make it a bit shorter - in that case I'll update it. Or maybe someone else has a good idea