Well except for the welcome sign that i built myself the rest of it was about 50/50. Sucks2BU and I were communicating with Skype and we were just built it as it came along. We don't use any hacks so we had to build scaffolding to get to all of spots.
Here is a list of the things I worked on:
Welcome Sign: All
Golden Gate Bridge: All of the 4 big pillars, half of a suspension cable and half of the vertical posts, the cross beams between the big pillars and a little bit of the main bridge part. Plus the calculations to make sure it all fit together.
Star Destroyer: This was mainly 50/50 with me working on the top, Sucks2BU working on the bottom as well as the engines and we both worked on the inside.