 Typically, the Rallye would be furnished with dual flying controls, each being complete with their own control stick, upon which controls for the intercom would be often mounted.While fully featured cockpit instrumentation was an available option to be installed upon the Rallye, the additional weight of this equipment would noticeably impact the aircraft's performance; thus, customers would have to weigh up the benefits of having superior flight performance or being able to make use of greater amount of cockpit features.All variants beginning with the MS.890 are full four-seat aircraft.