I have a 400 and 800 both with screw down Cartridge Door. The 400 has had a hinge put on it long ago, the 800 has not. They both also have a power switch that is activated by the Cartridge door.
The confusing part is that I haven't found info as into why or when they changed them.
The confusing part is that I haven't found info as into why or when they changed them.