Winglift

I think you use a digital “high torque” S3152 servo for elevator (second picture post 39).
Push and pull forces in the pushrod can be (with that lever on the servo of 10 mm(?)) about 5 a 6 kgf.
With these forces the servo will rotate a few degrees around the mounting screws I am afraid, so elevator position is depended of load (aero dynamical forces). I would prefer mounding in length direction.
It’s only an advice, maybe the servo never has to do that heavy job, but even then I always mount elevator, rudder and aileron (low torque!) servo’s in length direction for better positioning of the control surfaces.
See picture.
I wish you successful flights.

Cees