Sorry, but I haven't seen any photo that supports the turret shape which you use for the 8-inch and 12-inch guns. I don't see shadows of the turret overhanging the top of the barbette, the shadow effects on turret sides, and the brightness, are matching the vertical armour of the barbettes, and there are plenty of photographs which clearly show vertical turret sides.

Heck, look at your own photograph upthread: all three visible turrets have a vertical edge at the rear. I don't see any way to get that from sloped armour, and still have a vertical turret rear, without some implausible shaping of armour plate.

It's not a deal-breaker. I could make up a turret shell and smart-prop it to the model. I could use it as-is, though not as a US battleship. I'm doing stuff in an alternate-history in which minor navel powers might have bought a couple of pre-dreadnaughts and changed things.