Do you have any antenna tube or pushrod tubing?
Works grate for making your own hinges with a bit of push rod or stiff wire
- Just cut to length then cut each end off
- fasten the ends to craft and attach the middle to rudder
- put wire or push rod down the tubes
- bend or secure the end so it won’t slide out
If you are worried about weight you could use foam rudders taped to the tube, it’s not vary durable but vary simple to fix and vary light.