Ladies and gentlemen, let me introduce my servo's to you.. first of, on rudder, we have the ever hard working, Futaba BLS 451
Then, on ailerons, always ready to make a show, give it up for the Futaba S9650!
(notice; these are smaller than the holes, but they will fit without extra wood added.. I did use some covering in the same color, to close the rest of the opening)
And as always, last but not least, on elevators, we have the brothers of the aileron servo's, the allmighti Futaba S9650!