ORIGINAL: Rodney
It is not a good idea to use extensions where they seldom get exercised (mated and demated) as they will eventually cause problems, especially if you are in an area that has occasional high humidity. Avoid burying an extension in a wing where it will reside until the plane crashes unless you want to accelerate the time to first crash.
So.. what you're saying is that the aileron servo, for an in-wing installation (a servo for each aileron mounted in the wing) should be disconnected often? That would be fairly interesting. How about the rear mounted servos where the extension connector is in the center of the fuselage? We're supposed to open up the fuselage or remove the servo just to 'exercise' the connection?
I don't think so.
The servo leads are only 6 to 8 inches long and those long runs need an extension.
CGr.