This bit of Sketchup Help clearly says, " Scaling a component changes only the individual instance. This feature allows you to have differently scaled versions of the same component in your model. To scale a single instance, click the component instance with the Scale tool and use the grips to set the new scale, using any Scale tool technique…"
Well, I can’t make that work as written. Every time I scale a component instance, it makes that one a new unique component. I’ve tried various levels of nesting, making attribute values fixed or relative to parents’ attributes, numerous 3D Warehouse examples labeled as “scalable,” but no good.
Can anyone explain or provide an example of a component whose instances can be different sizes??? Thanks.