An easy solution to mounts?

[PvK]

Yeah, that's one way. I like the general approach I took in Proportions, which does a bit of cost change as you suggest, but also adds to-hit penalties for larger weapons. Combined with more varied combat mods for ship sizes, you end up with nice trade-offs between light accurate weapons for dealing with agile targets, and heavy weapons which are best against heavy targets.

PvK