[jowe01]

If you give the heavier weapon mounts (which are usually on CapShips "Combat to hit offence minus" modifiers and if you reduce combat sensors and ECM to 15/30/45, you get a very good balance between smaller "Piranha" ships which are able to challenge the larger Flying Fortresses.The mount modifiers would actually reflect the inertia of the heavy guns. The large ships would still be the choice when shelling fortified places like planets and bases, which themselves have "Combat to hit defence minus" modifiers.

I find these modification quite realistic as analogies to 20th century navies and I have therefore integrated them into my personal mod. It works very well.