Need tips for tightening joints of fakebusker83's Articulated Predaking Tail

I finally got my hands on one of fakebusker83's Articulated Predaking Tails (standard + extension / White Strong & Flexible Polished) from Shapeways.

Can anybody please give me tips on how to tighten each of the ball joints.
What about threading a long, bendable metal wire (like the one in a twist tie) in the middle of the tail? Could that work?

Can anybody please give me tips on how to tighten each of the ball joints.
What about threading a long, bendable metal wire (like the one in a twist tie) in the middle of the tail? Could that work?