ok, you should try stock first. ps setting the elevation min/max to 0 or +/-0.01 and the elevation tolerance alike will cause the launcher not to fire at all. i just changed the date in the destroyers .sim/obj_turret and in the launchers sim in guns_radars as followed: elevation min0,max 1, fire 0/1 elevation min 0, max 1; weapon_cannon/ elevation min0,max 1, elevation tolerance 0,01. the torpedos are running virtually at the same depth now, almost no nose-up. ill give elevation tolerance 0 a try. curiusly, only the middle launcher of the fubuki would go lower at me.
hmm...
ps. elevation tolerance 0 doesn`t work though, 0.01 works fine for me. ill add an magnetic detonator to the assigned torpedo instead
pss. tried the same with 0.001, only random noseups with the middle launcher. best solution for now