Meet my newest creation: #9 - "Die fesche Wienerin" - a double cake box four string guitar.
I had these two plywood cake boxes from Vienna lying around and couldn't resist turning them into an instrument... One was slightly smaller than the other (but exactly the same height) and individually they were too small for a full-scale guitar. But then I had the idea to combine them and make one guitar body out of two cake boxes... The boxes were a real pain to work with, because they're made from cheap and very flimsy plywood and they were not at all square. But eventually I managed to join them. I had to seriously X-brace the top, so it would be strong enough to withstand the pressure of four strings and to reinforce the joint of the two lids. The neck is made of mahogany. Since I don't own any power tools (with the exception of a drill) it's truly hand made: shaped with nothing but a handsaw, a rasp, a file, a little block plain, and loads of sandpaper.
The neck is finished with four or five coats of boiled linseed oil and buffed with beeswax. The body is finished with a few thin coats of spray lacquer. The side dots are made from Q-tips.
24.5" scale length, 15 frets, ball end nylon strings (the middle four from a standard six string pack).
I named her "Die fesche Wienerin" (something like "the snappy/jaunty/attractive Viennese").