oh WOW ... that wheel bike is AWESOME ... and your custom grievous is cool ... interesting construction technique ... btw, check out my custom General Grievous - it's in the moc titled "General Vengence".
Jordan's right. Lego goes for the cheaper way to do things, and not get them right. Yours makes theirs look like a piece of junk!!! Theirs probably is (I do not have it for the same reason). Good job Dan. Props to you for it.