You can use Ducimus' TW_PeriTDC_for _GWX as is. But you must change your sub, and subs you plan on using in the future, de and en_menu.txt files to the same as his to use his mod. Your TDC Salvo, using the left side slide out, and his dropdown TDC Salvo dropdown for the periscope must match.
His changes in his mod are:
[Salvo]
1=1,2,3,4
2=1,2,3
3=2,3,4
4=2,4
5=1,3
6=3,4
7=1,2
8=5,6
It seems I missed the order his are in, mine is slightly different. Either way will work ok.
Sorry for the confusion.

We've been running around in circles the last 3 days waiting for an addition to the family, the 12th grandchild. Today at 2:10 EST 8lb 11oz Logan Shores made his loud appearance into the world. We are in for it now, what a set of lungs this kid has.

LOL