Hi.
I am afraid modifying the turrets is very tricky.
But if you're still interested I can tell you what you have to do:
For VIIC / Turm 2 modify 7c_Turm2.tga.
For all the other turrets the turret skin is in the bottom half of:
NSS_Uboat7c_hull.tga (VIIC)
NSS_Uboat7b_hull.tga (VIIB).
As to converting Type II skins, I may do that in the future. But the requisite is you provide download link to the skin ...
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