I used the Ham-M SP which was similar to the Ham-4 except it has a knob
which you turn and a Braille panel with markings every 12.5 degreees.
I don't think it is being made any longer, but you might be able to find a
special one with a knob and the automatic brake delay. I remember reading
an article last year in QST about making mods to a rotor to handle those
functions. I think it was in a Short Takes column.
Steve
k8sp