Wanted to give ya some feedback on the Seige Starships. We tested a mk1 on a mk3 planet that we killed supply to. It had 105 turrets on it, and a fortress. The fortress, well it didn't survive long. I think i counted 10-11 shots and it went poof. Was about 30 seconds or so. Most of the turrets followed suit except tractor beams. I'm not sure if tractors are considered defense or not, but they didn't seem to really get a bonus to them. A mk3 tractor loses 3% health per hit. While this is respectable for 1 ship, when it hit the mk3 missile turret, it took 67%. Hope these numbers help you out a little on the balance process. Overall though, I love them.