Guitars and basses that switch from fretted to fretless
Mikey Guitars
http://www.mikeyguitar.com/
http://www.youtube.com/watch?v=MViWP44A ... re=related
http://www.youtube.com/watch?v=Omc5jOp7 ... re=related
http://www.youtube.com/watch?v=2qS7qxCp ... re=related
http://www.youtube.com/watch?v=le2W5oeK ... re=related