BALANCE MOD: heavy hulls rebalance needed

I just don't see the twice as much on the maintenance. Sure, it's a little more, because the freighter gets -25% to maintenance cost. But the freighter also needs more engines, which aren't exactly the cheapest component, and takes away usable space as well. So the cost of the core components (master computer, engines, maybe a pair of quantum reactors) gets amortized over fewer "useful" slots.

Anyway, there are also some issues with mines... the price of the warhead goes up much faster than damage, and the price of the hull goes up much faster than capacity, so your construction queue can turn out more ooomph by building a bunch of small mines with level 1 warheads, and the stealth characteristics are better as well. I guess the drawback is that the same number of mines fit in a freighter no matter whether they have level 1 or level 10 warheads? It doesn't seem to be a very compelling reason to use the high price explosives, by the time you get 40% cargo bays on that freighter it can carry plenty of bang.

The increased freighter size will make a significant difference in the balance. I like it.

I haven't run into any limit on the number of mines yet, have 245 in one particular group.