Watch out for these so called "interchangable" servo arms. Although they may have the same spline count, most of them do not have the same major diameter and minor diameter.

What does this mean when you try to "interchange" them ... slop ! Depend on what your applications are, some of you may not care about that little slop. But word of caution ... a little slop will develop into a "big" slop!

Yojedi