This is an easy fix guys (if you don't care about historical authenticity & renown upgrades)
go to:
C:\Program files\Ubisoft\Silent Hunter Wolves of the Pacific\Data\Submarine\NSS_*
* = the subs type
once in the folder of choice open the subs .upc file with notepad
here's the section you need from the NSS_Sargo.upc for example:
[UserPlayerUnit 1.UnitPartSlot 1]
ID=SargoConningSlot
NameDisplayable=Conning Tower Mount
Type=NULL
AcceptedTypes=SargoConningTower ;Only UnitParts of this type could be placed here
IDLinkUnitPartIntervalDefault1= NULL, 1942-07-01, SargoConningEarlyWar
IDLinkUnitPartIntervalDefault2= 1942-07-02, 1943-05-15, SargoConningMedWar
IDLinkUnitPartIntervalDefault3= 1943-05-16, NULL, SargoConningLateWar
ExternalNodeName3D= Z01
This entry is very near the top of the file
try this:
[UserPlayerUnit 1.UnitPartSlot 1]
ID=SargoConningSlot
NameDisplayable=Conning Tower Mount
Type=NULL
AcceptedTypes=SargoConningTower ;Only UnitParts of this type could be placed here
;IDLinkUnitPartIntervalDefault1= NULL, 1942-07-01, SargoConningEarlyWar
;IDLinkUnitPartIntervalDefault2= 1942-07-02, 1943-05-15, SargoConningMedWar
IDLinkUnitPartIntervalDefault3=
NULL, NULL, SargoConningLateWar
ExternalNodeName3D= Z01
In effect you now have the late war conning tower all the time.
Note the changes I made, this can be done for all the boats.
This should work no problem
Cheers