Dwain, that sounds like an excellent project.
I do some reverse engineering too and find that SketchUp makes it fairly easy to do. There aren't very many plugins that are "must haves" in order to draw furniture. In fact other than the CutList plugin, you can draw most things with the native tools. For drawing non-circular curves the BZ Spline tools would be handy. The Wudworx suite definitely speeds up drawing joinery. There are some basic plugins like Weld and PurgeAll that are useful for any sort of drawing work.
Where are you on the SketchUp learning curve? If you are sort of at the apprentice level, I think it would be wise to learn to handle the native tools well before adding a bunch of plugins.