I did a guitar repair course with Steven Delft back in the seventies, and one of the other guys on it was from John Hams. If you are looking for custom guitar work or great setups, Will Scott in Pembrooke is worth contacting. He has made me a couple of guitars and also repaired a Thunderbird bass which was in pieces when I bought it and fixed my friends 63 SG a couple of times (my friend broke the headstock off twice, and his son broke it the third time - at which point Will made a new neck for it!!).