Thanks for the reply Tim
Rewinding would be cool 8)
The tone pot doubles as a switch for phase reversal.
Would this pose a problem Tim ?
I've not a clue what magnets are in them at present to establish if there is
any room for improvement. According the original brochure the pickups were made by Chandler. I've emailed them for pickup details, but at present havent had any reply.

My guitar is one with mahogany back and a flame maple top, bolted on maple neck.