I am working on a woodworking design which has gotten fairly complex, to the extent that much of the finished part makes it difficult to work on the parts currently under construction. To simplify the job, I have created a second drawing where I do all the new work. When a major assembly is finished (in this smaller, simpler drawing) it is saved as a component and inserted into the main project drawing. I think this must be how SketchUp designers intended us to work (similar to Photoshop's "smart objects"). However, if I subsequently edit this secondary file, the component inserted into the main drawing does not become updated. Alternately, if I edit this component in the main drawing, it does not change the version in file #2. What is the solution? I don't want to have multiple versions of a component (only one of which is valid). Does SketchUp have smart components?