When used it on sprayer level or pedal mode ?
Lever - hydraulic pump, so I fixed revs at about 1500 on AB throttle switches (if only they were the same on the 76&77's!) and set two speeds on the sv1&2 - spraying and turning - so in spuds 4&11kph, cereals 6&12kph. It was possible to get the Teejet 844E controller settings and decelleration/accelleration speeds pretty close to maintain rate almost regardless of speed. My sprayer tractor for 12 seasons - unquestionably a step forward in 2006 when it arrived.
Round baling - forager mode, quad baling lever mode.
Carting beet - pedal mode - if that fails, you're properly stuck!
Fert spreading, drilling, potato harvesting (hyd webs) etc, fix engine speed, use lever.
Destoning - hand throttle and lever - get the best out of the machine by varying both
Its been replaced by a 2015 MF7618 DVT EX - so far so good!