Just a though...
But it seems to me that the VIIC conning tower is WRONG! From all the pictures and stuff that I've seen, the Conning tower for the 7c seems to long and box-ish. I hope I'm not the only one that thinks so...
My proposal to fix...
Take the VIIB Conning tower (Which I believe to be correct) and change the inward slash at the back, to an outward slash-back like in the 7c.
OR
Use the IXB/v1 conning tower (the one with only 1 AA emplacement) and put it onto the VIIC body.
BUT I must admit, I have only the faintest idea of how to do this, so all I'm really trying to do is constructively wine
Just a though...