<<What John is referring to is that the splines on the servo don't have the same ratio of degrees as the arms, so that if you line up the #1 arm (look closely, each arm is numbered) and it is not centered, you can try the #2-6 arm.>>

MY GOD! I never realized this! I never even considered the possibility! This explains why some of my semi-careful alignments seem to be slightly off after I snip the unused arms. I figured I was just misaligned when I replaced the horn - not that they were designed that way. Like most thngs - it do make sence once it's been 'splained.

MikeB for President!