Nice work! A very ambitious project, to be sure. The Pontos set is very comprehensive and goes a long way in helping the kit, overcoming many shortcomings.
Trumpeter is known for producing kits with some accuracy issues. But they offer subjects one can't find anywhere else. Large 1/200 scale kits have a lot of "wow factor".
One of the more conspicuous shortcomings of the kit is that Trumpeter included the wrong 5"/38 twin-gun mounts, an easy mistake to make. The Trumpeter kit includes Mk.32 mounts, which were fit to cruisers, aircraft carriers, reconstructed pre-war battleships like Nevada and Pennsylvania, and other ships where weight was in important consideration. Fast battleships of the Iowa class, South Dakota class, and North Carolina class were fit with heavier Mk.28 mounts, which have a slightly different shape and thicker armor. Missouri and Iowa carried the heavy Mk.28 mounts, not the Mk.32s included in the Trumpeter kits.
Click here for a US Navy drawing of the heavy Mk.28 Mount, fully dimensioned.
Click here for a US Navy drawing of the lighter Mk.32 Mount, fully dimensioned.
The two mounts have a similar shape and the same width but the Mk.28 is taller by nearly 6 inches and the Mk.32 is longer aft. This makes the Mk.32 look squater. To the casual viewer, the difference in the shape of the front of the mount is more noticeable. The vertical portion at the bottom is taller on Mk.28 mounts.
Mk.32 mounts are correct for Essex class carriers, USS Saratoga CV-3, Baltimore and Cleveland class cruisers, rebuilt battleships Nevada, Pennsylvania, Tennessee, California and West Virginia, and other ships, too.
Early Atlanta class cruisers carried Mk.29 mounts which were dimensionally identical to the Missouri's Mk.28s. Later ships of the Atlanta class (also called Oakland class) carried the lighter Mk.32s.
Another configuration of twin-gun 5"/38 mount was commonly fit to Allen M. Sumner and Gearing class destroyers. Called the Mk.38 mount, it was even lighter yet and a bit smaller. Mk.38s can be easily identified by the conspicuous, external rotation stops at the bottom of the front of the glacis (frontal armor plate). Some Coast Guard cutters like Wind class icebreakers and some post-war Italian destroyers were fit with Mk.38s.
Correct-for-Missouri aftermarket Mk.28s are available, if interested.
Again, great job and am enjoying your build!