 The cockpit can be heated, providing that the engine is running, and the seat backs can be adjusted and cushions of differing thickness inserted to accommodate a range of body sizes.Total weight is around with a maximum load of though this depends on mod state and history of the airframe and is rarely above 200 kg on most examples.The Royal Air Force sought and obtained a number of military specific modifications; including a dispensation from Grob for operating the military variant aircraft to a Max AUW of 908 kg providing an extra 59 kg of useful load.