All of the turret fittings found on the Maus II turret. this is designed to be built with these drawings of the turret pannels made out of styrene sheet.
http://https://drive.google.com/file/d/1NjHXZVP0_hhL2238XTgxBaJg1BA2hVTC/view?usp=sharing
Mantlet for the turret
http://shpws.me/Pc1u