Then to hold it in place, I cut off two more pieces of angle, 1" long. On each of these pieces, I trimmed one leg to 3/16", the thickness of the bronze casting flange of the quadrant. These were to serve as the clamps, to be held in place with the 1" 1/4-20 stainless bolts, fender washers and nylock nuts. For the piece d'resistance, I applied a dab of 5200 to the top of each end of the aluminum angle before installing. I think this is going to stay in place. And it avoids weakening the bronze quadrant casting by drilling holes in it.
The aluminum angle got an 11/32" hole bored in the exact center to take the ball bolt. (By the way, if you ever need any replacement parts for your rudder transducer, these are the 10mm rod ends and ball bolts that are used with gas struts. Search for them that way.)
Installed with a lock nut and washer at each end, and voilà, Ray gets a solid, repeatable, linear report of rudder position!