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yeah that would create errors just an fyi

holes don't necessarily always have to be round, but for things like holes machined into metal this works well :)

If you have an area already modeled and cannot start with a cylinder, this works well.

http://img121.imageshack.us/img121/2228/roundholestut.jpg

Just something I saw illustrated elsewhere, so I thought I'd reiterate it for you guys.