I had an old Mastertiller autopilot that came with my Montgomery 15. Unfortunately, it would only work in one direction. I sail single handed most of the time and find it hard to leave the tiller even with bungee cords on it to do important sail handling and personal things. When I sailed on Sean's Montgomery 23 Dauntless (
album here) this summer, he put an autotiller on for awhile. This convinced me I had to have one.
The old Mastertiller was attached to the outside of the cockpit wall. My new Simrad TP10 was too short by about 7 inches to reach the tiller from this location. I also did not like the idea of the unit hanging outside the boat. I decided to mount it inside the cockpit, but it was still 2.5 inches short. I did not want anything sticking out 3 inches into the cockpit. The length problem was solved by buying a 60mm screw on extension for the push rod. Now I had to find way to attach it inside.