When you create groups and components in SketchUp, the default bounding box isn't always ideal for the geometry inside your group, this is how you change it.
Skill level: Beginner
Skill developed: Changing group and component axis
Please post on the SketchUp forum, link below, and exchange ideas, alternative methods for any given exercise or share your results: http://forums.sketchup.com/t/sketchup...