Thank you Tracy,
After Stefan pointed out the notch, I started doing my own measurement and came up w/ the same positioning as his outline. I never considered that the notch was not just an extension of the flight deck angle but rather approx 22’ aft. When the notch is measured at this location on the Trumpeter kit I noticed that it would literally come all the way to the bulkhead… That’s when I took a closer look at your picture above along with this picture that I had which I never felt was “conclusive” in clarity.
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However in your picture you can clearly see that the notch has in fact been “fixed”. It is very conclusive, you can see the where the 20mm gun positions were left in there after position (as compared to most other Tico’s). So I'd say when you compare the two pictures it's pretty clear that it was part of the overhaul as you stated.
This had always been a question of mine because the flight deck clearly was never lengthened as it was on Ticonderoga and the Mk 51 positions moved outboard to the catwalks. Also of interesting note is that the flight deck level 40mm Guns adjacent the 5"/38 positions were NOT lowered and should still have their cut-outs

Good lord the Hancock certainly was a unique carrier.
So I spent about two-hours carefully cutting the forward flight deck off of my Hancock and prepping for a new section. The position of the notch will now call for some real care to redo and yet be able to still use the catwalks in the Eduard kit.
I have not seen this picture on this forum yet so I thought I'd include it too; it is Hancock probably late 1945 Operation Magic Carpet returning to Alameda CA.
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