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This is the result of letting my son play with TinkerCad. It's not 100% but it was educational for a little boy.

Edit it online https://tinkercad.com/things/aXSDkhsFwd6

Read more at http://joesmakerbot.blogspot.com/2012/10/drews-castle.html

Polysoup.stl does not have a flat bottom and will not print successfully at all without a lot of wasted supports. Andrews_Castle.stl has been fixed. There are still some overhangs I left in for educational purposes.