We installed a Trio Pro Pilot autopilot, a modern digital autopilot. One of the amazing features of the Trio Pro Pilot are the two Gold Servos, which are smart servos with a Pentium computer chip inside. They do not have a pin to lock the actuating arm to the shaft, but a slip clutch. So, if the autopilot must in an emergency be overpowered, the clutch slips and does not shear a pin.
We did a lot of measuring, designing, cutting aluminum angle, and drilling holes for Adel clamps to attach the servos to the cage tubes. They had to be mounted at an angle that allowed the servo control arms to be clamped to the appropriate cable and be able to move the elevator or ailerons through their full angular deflection. We are very proud of the installation we designed and executed. In fact, Trio, i.e., Chuck Busch, the chief engineer, was very impressed with our ingenuity and said it was the best installation he had seen.
We were forced to make a custom stop for the roll servo arm so it would not go "over-center" in the full excursion. I've included a photo of this aluminum part with dimensions.
Another problem we ran into was the pitch servo push "rod" (actually a rectangular piece of an aluminum bar) ended up so placed that it pressed against the pilot's seat pan. So, we cut an elongated hole in the right side of the seat pan, formed a piece of blue foam, sanding it to shape, and then covering it with glass and vinyl ester. This worked out just fine. The "bulge" inward did not interfere with the pilot's seat se=e????