I love the mini crossbow for cotton swab design - lots of fun.

I noticed that the string wasn't deploying smoothly an evenly, so I rounded the edge for a better deployment. I also rounded the channel where the swab (or dart) goes and introduced a nut & bolt approach to attaching the trigger (there is an extra set in case one breaks). I would recommend a stronger material for these parts in particular. Please let me know if you have any other adjustment ideas!

The small part is an adapter to mount a pushpin to a standard 3mm bamboo skewer - it has a spot for the pin to snap in and it's threaded on the other end, so you just have to screw it onto a cut skewer. Make sure to remove the 4 tiny supports on the adapter.

This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/fZ7ZTQNEbD5