Steve to shape PE turret is much easier than it looks, you simply pull brass around any metal or another suitable rod. It shapes itself. When you glue bottom on plastic base, its top copies it as well, and you get perfectly rounded piece. 1 minute job. It would be very easy to supply this part in plastic with the kit, but not an option for me to have it looking like 2 inches thick armor in real.
For more details including interior you can download assembly instructions at Mirror Models website and check out, another detailing set is available from LZ Models, and there will be also radio set available soon, while loads of stowage or ammo boxes are offered from many producers elsewhere
Cheers
Libor