I always PRE DRILL the holes for the servo mounting screws with a 1/16" or 1/32" drill bit. Physically check the drill bit against the screw for size. You want the bit to be the same size, or slightly smaller, than the shank of the screw. The shank is the metal part MINUS the threads. This will keep the servo rails from splitting. I then harden the holes with A SMALL DROP of thin CA.

For blind nuts (T nuts ) I match the drill bit to the part that will be inserted in the wood. I like the bit to be slightly smaller than the insert. After the blind nut is in place, I CAREFULLY put a drop or 2 of thin CA on the outside of the flange. Be careful not to get it the threads.

There have been several good ways to do the throttle cable described here by other members. Just remember, If you use a metal rod use nylon clevises on BOTH ENDS. If you use nyrod, either metal or nylon clevises are OK. The reason for this is the metal to metal contact frequently generates rf which may transfer to the servo and interfere with the receiver. The nylon rod/clevises minimize/eliminate this potential problem.