Oh, I wouldn't, really. It's just that if it is a copyright violation it's rather an absurd one, since it would be protection of a model that's the result of steps taken in a tutorial, where the information that is really the subject at hand is the tut, not the result. Sort of like if you were legally prevented from selling a dress you made from a Simplicity or McCall's pattern. Or like signing a non-disclosure/non-comp agreement before taking a college class, so you can learn but you can't use what you learned.