RE: RCM Piper Seneca
You will need to strip off the lower sheeting of the stabilator and cut an access hatch into the lower fuselage to see what type of set up was used. I made a removeable hatch on the lower rear of the fuselage to access and check the internal stabilator and rudder linkages. By the way, the stabilator will always have some wobble to it as there is just no way to totally eliminate it. Only once did I experience some flutter, but once I replaced the elevator servo with a heavy duty servo I had no further problems. Unless the plane is a total basket case, it can be restored as most of the hard work has been done. Post some photos if you can.