I made a mob grinder last night (from the video @Kord posted in the first post) it's got 6 levels and it took me 4 hours to build. I had some help from @Strategist and @sLAUGHTER and I didn't take screenies because I was in the zone.. then I dropped my pizza on the floor.
Strat was recording it, I hope he posts the video because that would be cool to see. I'll take some screenies tonight when I get off work. I'm really impressed with how it turned out