RE: TF GS P-51
I did this in my smaller TF P47. Works fine, but REALLY fiddly when I had to disconnect the arms/clevises from the aileron servos to adjust the throws (couldn't remove servo/hatch until disconnected pushrod, whilst still trapped inside the wing...).
Make sure you allow for easy adjustments. Also make the horns reasonably long still - probably need pushrod to come out of the lower skin before the TE to achieve this.
Cam