A statement about the ventral gun:
"The worst thing ever designed was the bottom turret of the B-25. It was the stupidest bit of equipment. My God, the operator is sitting in one place getting a reverse image through a mirror. He couldn't hit a thing. It slowed the damn plane down, and we weren't getting belly attacks anyway. What they really needed was a tail gun, which they eventually installed."
So for AH it might be right to have it removed.