The aileron servos are JR DS-8411's with plastic gears installed. BTW, the pushrods on the elevator and aileron linkage are made using a technique I picked up from Chip. The pushrod is .060" carbon rod and it is just glued to the end fittings using CA. You install the control horn, tape the control surface in neutral, get the servo installed and the center set. Then put on the end fittings, cut a piece of rod to fit, install it and glue. At first I worried about not being able to adjust the linkage, but if you do it correctly you never need that adjustment. These are light and simple.