How should the fictional Hindenburg cruiser be upgraded for Allied Second World War service?
Short answerReplace the high-pressure machinery and select a common dual-purpose gun available to the receiving Allied navy.
NotesAlex would replace the fictional cruiser's German high-pressure machinery first. His concern is the burden of maintaining individual plants and supplying their distinctive spare parts. He would then fit a common dual-purpose gun suitable for the Allied navy receiving the ship. Availability and support within that fleet guide the proposal.