What I really like about Jon is if I have an issue or want something tweaking on my bass, it's a lovely 45 minute drive through some really picturesque countryside and it's done there and then on the spot by the guy who built it. When I wanted to change the awful Nordstrand pups my bass was fitted with for Wizards, I left the bass with him and nipped into Sheffield for a couple of hours. When I got back, the job was done and he'd converted the series/parallel toggle switch to a preamp bypass for me - cost? £20.
Unbelievable service.