Good call! I have had a fair amount of flying on mine now and am glad I went the stock edf route. Fit a decent servo on the all flying stab. My first servo was just not up to the job and it made for some interesting moments ( Especially at the bottom of a loop, or reversal [X(] ) It can still feel a little numb on the stab at times, but you get used to that. My big Skymaster F-4 was just the same.
The best thing I have done to mine was fit a JR G370 A on the ailerons. Any tendency to wing wobble has now disappeared.. even in a cross wind!
Regards Al
