It appears that there is no specific prohibition against an aerofighter carrying a light vehicle transport bay (or if there is I have not yet found it).
My question is this: can this light vehicle bay be pod mounted on an omnifighter? Or would it have to be fixed equipment? I know cargo bays and infantry compartments can be pod mounted, so I'm kinda hoping that the same standard applies. On the other hand, it's a pretty big piece of equipment.
