Homeworld2 - Progenitor ship

I made this in Google Sketchup 6 by tracing a piece of art from the game, so the proportions should be more or less spot-on. I think I botched the bevel around the edge, and the thickness is pure speculation.

Pictured at the top for scale:

assembled Progenitor Mothership "The Gatekeeper of Sajuuk" - 8.5 miles long (excluding bridge)
Hiigaran Flagship "The Pride of Hiigara" - 1.55 miles tall
Mount Everest - 5.5 miles to summit
Nimitz-class carrier "USS Ronald Regan" - 1092 feet long at flight deck