the IJN 5 inch/40 was one i had already requested. He has the drawings for the unshielded mount. I sent him the drawings for the shielded type found on the Yamato class and also used on the aft end of aircraft carriers on the funnel side. This shield was used to protect the gun crews from funnel smoke on the carriers. On the Yamato it was used to protect the gun crews from the blast of the 18 inch guns.