As I said I ran an analysis, and I can assure you that the available torque is HIGHLY dependent on the proper linkage geometry, in particular the length of the servo arm.

For instance, going from a .43 in. length arm to .6 in. DOUBLES the servo torque requirement.

A builder must be very careful to make accurate linkages with this design, as in any design, but more so here because of the geometry and the very high speeds people are pushing.

BTW this post is not meant to fly in the face of anyone else or any theory, I am only saying that ALL THINGS BEING EQUAL, watch the geometry!