In mission shot of torps page VIIA, Altered sim file, and altered menu page to allow extra torps to show on screen.
these are the exact same adjustments I made for the IXB, the only difference is all the tubes are in the right places, and the crew is present and correct,
the periscope page is set up for the new stern tube automatically,
as soon as I rename files and bones, all this goes bye bye, I have tried every way I can think of to get around it but nothing works.