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I made a case to protect my darts when taking them somewhere. Here are some more images. The case was made to fit a specific model and it's not very parametric till then end, so I'm afraid it's not super useful for others.
It was made in #FreeCAD 1.0 which was super smooth!
If you ever printed a 2nd iteration, you could created a space for an oring to sit for each dart so it gets lightly held in place by friction
I was going to say to just make the end slightly undersized so when you push it all the way in, it gets held in by friction.
It's a good idea but I'm sceptical about anything friction to hold the darts. The problem is that they have very sharp machined rings that make them very non-slippery to the fingers. I'm pretty sure those rings would file off anything they slide against very quickly.
The steel tip does not have this problem though, so adding some part that pushes against the tip might be the solution. Alternatively, i could also make the part that houses the flights be somehow spring loaded and squeeze them.
Giggity.