1) The turret-sides are sloped - not straight up-and down (see bottom pic):
- and -
2) I just showed an example of turrets with "bumps" on the sides - of both forward mounts - on HMAS Australia:
In any case - whatever they were - this is the kind of detail I am always going to include on a master: very easily just shaved off of any casting(s) where not desired (as, in fact, appears would be the case for Exeter herself).
David, you would do a lot better by asking about such items before just laying down conclusions, as you did above (which, among "normal people", is also distinctly rude), buddy.