Keith,
If I were doing this job and had a few bucks in my pocket, I'd look at
the RotorEZ cards from Idiom Press. Models for Hy-Gain and Yeasu.
The one for Hy-Gain turns the front panel calibrate knob into a pointer.
Turn the knob to the desired direction, hit one of the buttons and
off she goes. Also includes a brake delay to let it coast to a stop
before engaging the brake wedge. Higher price model includes pc
control so you can operate the rotor from within your logging program.
I think you can purchase a box with the board installed from Norm's
Rotor Service, or the Rotor Doctor, or somewhere.
73, Steve KW3A