I have the servos all mounted longitudinally. it's hard to describe the problem in words that I am seeing with the 6 volt throttle servo. Its very noisy and does not seem to consistently move at the same speed. It does seem to stop at the right spots all of the time, but its like, I don't know, watching it and listening to it I am expecting it to start smoking or burst into flames at any moment. Its like it wants to go really super fast or something and then it just seems slow and all the while it rattle and buzzes. I have tried others and they all act crazy unmounted. I thought securing it to the tray would settle them down and mouted one, but it is crazy when installed also.