I hate to say it but I have to agree with cstevec. No ARF is ready to fly as it comes out of the box, hence the term "Almost Ready To Fly". With this in mind, it is the sole responsibility of the modeler to correctly install all of the components necessary to fly the aircraft. It is also the sole responsibility of the modeler to take the necessary steps to insure that all components are functioning in a matter to allow safe flight of the aircraft. If there was no ply backer for a particular servo, it should have been obvious when the servo screws were installed. It would have been an easy fix at that point without the need to tear apart anything. Again, I hate to say it but the modeler was at fault here by overlooking an important part of the structure where an end user component was being installed.