This is how I do servo extensions.

I use ashlok connectors on the interwing connections, 6 pins at the main wing and 3pin at servo ends.



On the linkages I solder one end of the rod to prevent it ever unscrewing itself under vibration. The included nuts do the same thing but again this is just an extra precaution.


Finally I've put foil in the tail cone just a bit of bling and it's protective qualities.