Even in the old GpB days the tuner was the big deal
In the Sierra's it was Terry Drury or Karlssons
In RS200 it was Jon Minty Jeff Page.
6R4's were done by Goodmans or one or two other guys
I had a look on Ekky's site last night and could find no reference, so I would guess someone Swedish like Karlssons, they used to do a lot of work with Erksson but seemingly not anymore.
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