I recently saw a program on Discovery Wings where they did open the butterfly doors on the nose and loaded a type 38 Panzer into this beast, Along with troops sitting on a platform above the vehicle. They also stated that the 323 was a cumbersome aircraft and fell apart when hit, as to the cloth and wood construction of the nose doors. I would much rather use a spawn point, than to be dropped over enemy ack that could down the transport before you even got the doors open!
