So... I know you sound like you've pretty much settled on this turret-ish torpedo launcher design... but I just wanted to throw this out there. You know how your and most trek torpedo bays are oriented horizontally? That is, if there are two launchers, they're usually side by side. What if you stacked them vertically and gave them more of a vertical alignment? I think especailly in the neck it might not make them look quite so bulky or stick out quite so much.