Feel free to post updates, since you're not terribly experienced we'll try to go easy on the criticism. Since you're not stepping on anyone's toes no one should have any problem with you modeling it, I'd actually love to see it come out nicely. If we use it you'll be credited as a contributor. Anyway, if you go to the ship database, any fighters that have their meshes completed should have a poly count listed, seems like most around around 4-6k right now. Since the Xg-1 is a lot of flat surfaces, I don't see it needing more than 5k. However, since its only references are pretty much in the games, you have room to be a little more creative with it. One thought we had was that it should look more like the Lambda, since they were both Cygnus designs.