I was a little confused about what the X-Card was, but it lead me to reading about it on google, and I discovered a nice little tool for games!
Formatting for this game looks beautiful! It really is pleasing to the eye! I also am a big fan of the idea of developing a "space" map with mega-structures and creating a world for them!
I definitely could see this being a great way to create a world for another game to play within such as D&D!