A couple of years ago I turned my Ozark six string guitar into a guitar bouzouki. The experiment worked out very well and the instrument sounds completely different to what it did as a guitar. It cost me about £25 altogether and that includes a new set of strings and a new drill to drill out the extra holes in the headstock! I was lucky in the fact that it had a bridge big enough to accomodate the extra holes underneath the original ones, you couldn't do this on every instrument. If you want to see the instrument in action both as a guitar and guitar bouzouki have a look on my YOUTUBE channel (Bailliekins)I found it comparatively easy to do, but some people may not. I'd certainly recommend it to anyone, at the end of the day the instrument only cost me £100 when I bought it so it was worth the risk. I even emailed David Carroll at Ozark instruments and he was impressed with the result!