I use the two aileron servo configuration and it works fine. I agree with Silversurfer's comments on the elevator servos. I used a Y harness on the ailerons and two separate channels for the elevators and then mixed them with a Futaba Super 8 radio.

Check out this thread for pictures and additional comments on this subject. http://rcuniverse.com/showthread.php...782&forumid=38
In one of the thread I provided info on what I did for the slave rod connection for the lower and upper ailerons.

Hope this helps.