Well...
Regarding the AA cruiser, very doubtfully. I don't think that hull(which is very blocky, making high speeds impossible) can carry that amount of guns.
Also, quad turrets are infamous for being overly complex and prone to breakdown, often hampered by jaming and slow rate of fire(the general rule is: the more guns you fit in a turret, the slower will each individual gun fire). They will also be very heavy, making training and elevation too slow to serve effectively.
There are reasons why the most succesfull DP mounts of that era was in twin mounts: it was simply the most balanced alternative.
I would also suggest you read
this thread, especially the comments from Klags.
And lastly, and this goes for all ships you've made so far: Just becouse it looks like it can fit(on the surface), doesn't mean it will. You will have to take bellow-deck structure into account as well. Please, visit
this thread for more notes on this.