thanks Polyfiller, I think that might've done it
6th attack :
damaged but still there !
look at the depth ! then I went down to 1640 feet , now I'm sitting it out on the bottom sort of !but couldn't get back up of course
ok now I can try and set 4 tubes per torpedo room, set the stern torpedo room to take torps from the bow bunker and set them up on the bow one on top of the other like in RL and like in the Sen Toku (which has since been added to the Jyunsen B.. v3.9.2 mod 8) )
keltos