Does my economy just suck or does it feel like retrofitting is way too expensive? I can easily afford the resource cost, but it's the money cost that only allows me to upgrade a ship like once every 10 turns if I wanted to. Does the length of game (I play long & slow) have any bearing on the upgrade costs? I'm still using no maintenance ships, and upgrading from a 2 attack to a 4 attack, or a 4 attack to a 6 attack is costing me 350 a pop. I can build all new ships quicker than I will ever be able to retrofit/upgrade.