We're going out for runway testing this weekend and we'll see if we need anything more added to that lever system. For accuracy on the upper end of the pitch range I might want to mill some sort of 'gate' system that allows the pilot to adjust one degree at a time by feel. We'll see.
The handle had to be removable to enable entry and exit for the pilot -- turns out the handle from my angle grinder was perfect and threads on and off.