Today I was bored and my internet wasn't working, so I went into SourceForts and made a cool little fort. It's not quite an überfort because it got a little messy near completion, but I did make it completely exploit proof, so there are no "cheap" ways in and out of the base and flag. Also, there are 2 tunnels leading into the flag but one is blocked off to promote confusion of the enemies. :-)
And a video:
Linkity link.
P.S. Yay, my first post on these forums! If you've seen me in game, hello again