Gerry,

I am not positive what rudder servo arms you are talking about because we have a couple different setups in our personal planes. I have a feeling you are probably refering to the phenolic ones. They are actually made by Comp Arf, I stole some from Jason Shulman a couple of years ago and have been reusing them. They work really well with the Futaba 9152's because most companies don't have a large arm for that spline. I bet you can probably go on there site and buy them.

As for the exit of the pull pull, if you feel the back of the fuselage you will find two cutouts for rudder servos on each side. We generally make the exit about 1/2 inch to 3/4 lower then those servo cutouts and in between the two of them on each side. We try to keep it pretty basic when setting them up.