Because the original thread has become ONLY about the Leone, im cutting them into two
Italian DDs have the fewest turrets, and the worst space. Most of the them only have slots for 2 twin 5inch guns. That becomes rather ridiculous when other destroyers mount 4-10 guns up to 7.9inch.
Mind you an alternative to raising any ship's space is to decrease one or more gun's space value.
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#1 DD2 Turbine has 2 73space Rmounts and 2 49space Rmounts. I suggest its Rmounts be changed from 73 to 90space. It would be able to mount 6inch twin guns then, and still have only 2mounts.
#2 DD2 Navigatori has 3 73space Rmounts and 2 35space Tslots. Like the Turbine it cant mount twin 5/6inch guns, so raising its Rmount space from 73 to 90would allow 3 twin 5-6inch guns.
#3 DD3 Oriani has 2 70space Rmounts and 2 40space Tslots. Raising its Rmounts from 70 to 90space would allow up to 5-6inch twin guns.</p>
$4 DD4 Soldati I has 2 73space and 1 43space Rmount, and 2 45space Tslots. Raising its 73 space Rmounts to 90space and the 43space Rmount to 50, possibly 56space would allow up to 5, 5-6inch guns
$5 DD4 Soldati II has 2 73space and 1 43space Rmount, and 2 45space Tslots. Raising its 73 space Rmounts to 90space and the 43space Rmount to 50, possiby 56space would allow up to 5, 5-6inch guns