This is my Lego SGC. It is most likely the bggest and most expensive set ive made for Stargate. The Stargate itself is not completely round but LDD does'nt have the tools to make it a complete circle. I did not spend much time on this and tried to make it as accurate as possible while keeping at a low price so maybe I could purchase. It costs $300 so I'll probly buy its in parts rather than the full thing. The Briefing Room is actually supposed to be above the Command and Control center.