This is a project I started on my friends private multiplayer server. Most of the structure is in place except the last 14 layers and I have started working on some of the final touches such as pulsating warning lights that run down each side of the cannon. It was built by hand block for block but I used the To many items mod for the materials, so far it has taken about 12 hours of work to build but that was spread over 3 days. The server is being used as a mega project playground for me and some friends so look for more projects in the future!