Well, I finished up the first prototype CBG. I still need to put a permanent bridge and nut on it, but I have a friend coming over who plays guitar to check it out and make suggestions as needed. Once we get the action figured out, I will replace the bridge and nut with permanent ones and glue them down.

I did notice that if I play a note much farther than about halfway up the neck, the strings will hit the edge of the cigar box lid. I moved the bridge around a bit to eliminate some of it, but they still touch the lid a bit.

The next one I make (soon), I will cut relief areas on the neck so the neck and the lid are mostly flush, or maybe the neck will sit a bit higher than the lid.

This first one was definitely a learning experience. But, all things considered, it did not turn out too bad, seeing as it was my first attempt. The next one will be far better.

Thanks to all for their suggestions.