Digital Servo for the throttle? Why would you go through all that setup and expense? A simple $19.00 basic servo will do just fine. In fact, some RC'ers have used the small micro servo's for the throttle just to save weight. It's just not needed.

Now, if you are FAI Pattern, where every movement of the sticks on the transmitter means points, well, I guess you could justify it. But otherwise.. a basic servo does just fine.

CGr