I posted here, as I think of Sketchup as one of the many tools at our disposal. But having struggled with Sketchup I started looking for ways to use it more effectively, and found this site, which, I think, has some excellent tutorials.
http://sketchupforwoodworkers.com/
http://sketchupforwoodworkers.com/

- and for the most part I find it pretty intuitive and straight forward to use (but I am familar with other CAD apps which most definitely is an advantege)
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