Are you saying that there is enough give and play in the rubber servo mounts, and the linkage to allow for any minor deviation in end points of throttle arm? And, by careful adjustment of trim, there should be no problem?

Somehow, it just seams that there needs to be some kind of fuse in the linkage between the throttle arm, and the servo motor. Relying on PRECISE adjustment appears to be your answer. Even some change in the idle adjustment could affect this.

Thanks for all your responses. And, I want to get a plane ready to fly!

On one of these planes I put some fuel line on the throttle rod, and drilled out the hole it goes in, so that the rubber fuel line acted as a spring. I have seen an airplane that probably had NEVER run at full throttle, because the person that set it up never realized that it was confugured (sic) wrong!

Nate