If the parts are split up correctly, there should be no real issues.
I've looked at the faces count for existing Subs in SH4 and We can easily work with those numbers.
The Hull and common parts would be in the Submarine folder.
The bridge would be the Conning Tower so would be in the Objects folder.
All Weapons should be placed in the correct folders also.
This will allow further versions of the Bridge and Weapons systems for different versions of the Higgins, like the Gun Boat version.
