To aim the gun, the turret was rotated by electric motors into roughly the right position, but fine adjustment had to be done manually.
The earlier turret was staffed by only two men, the commander (also acting as gunner) and the loader. Having to full-fill both roles limited the commander's effectiveness.
The recalcitrant gearbox made changing gear particularly difficult - this was the second biggest weakness of the Soviet battle tanks.
Most undamaged captured T-34 and KW tanks were abandoned due to clutch failure. (Special thanks to Dierk Schmidt, UK)
Source: Spielberger, Beute-Kraftfahrzeuge und -Panzer der deutschen Wehrmacht, Motorbuch-Verlag