Tim outstanding job and it looks really authentic. The TC hatch locks down about 45 degrees back, you just have it a little to straight.
Suggestion only; drill out the vision blocks in the TC cupola, cover them over with Micro Glaze.....from Micro-Mart. You just drag the solution over the hole and when it dries, it looks like glass....designed for model windows...works neat. Then addding periscopes, by using a thin strip on plexi mirror (get it as trash from any place that does bathrooms) cut it to match the scope mount like the gunner's
direct fire scope. File the rear 45 degrees and glue it on, cover with a flat sheet only, as the gunner's scope did not have a wire guard over it. Makes a really neat final touch, especially when you look at the tank with the gunner's scope looking right back at you. With the fine work you have done, it will really set your Pershing off.