

About the Mantis ship, it would be interesting to see a non-boarding variant. Something that can really change those ships up too is the randomization of the crew. Without a couple Mantises you may have a challenge.

For the Crystal Ship I have several hull images you could use. RAD-82 kindly made them for me, a long time ago, when I asked him.

http://imgur.com/a/d4BJ9#0
Here's a link to RAD-82's Resonance mod, you should also check out his Crystal Cataclysm mod. It may give you some ideas for Crystal ships.
http://www.ftlgame.com/forum/viewtopic.php?f=11&t=23581
I would love to see an amethyst ship, emerald, diamond, yellow diamond, sapphire, etc...
And for the Federation ship, randomizing the artillery provides a lot of ways to make that ship unique, there are plenty of artillery weapons in Captain's Edition that could be used on those ships. (Perhaps they'll be put to good use then, since they're still sooorta... broken



