In 2004, Andrew Guyton of Guyton Guitars, a luthier in the UK, manufactured 50 authorised, limited edition replicas of the Red Special: 40 in red to celebrate the 40th Anniversary of the guitar, and ten in green, as he had previously seen a green Guild copy that he liked. Pete Malandrone, May's guitar technician suggested having X-ray images made of the original guitar to allow more accurate reproduction of the internal chambers. This was done in 2003 at St. Bartholomews Hospital in London. May has since commissioned Guyton to make several other Red Special variants, e.g. with a scalloped fretboard, a double-neck and an arch top semi-acoustic.