PS.. check that your aileron and pitch servo arms dont hit the metal frame stiffener at full positive collective + cyclic position. Mine did.
To fix it I trimmed back the thread on the ball slightly so it didn't stick out of the arm plus I added carbon spacers under the servos to push them out and back slightly. It's a common problem on the 700X. Possibly it only happens on the bench because you would rarely have the servos deflected that far in flight but from a good practice point of view the servos shouldn't bind.