Spoken to Alan on email. Wow, quick response - thanks Alan!
He’s pricing me up a P-Retro harness and I’ll stick one extra hole in so I can keep the series/parallel switch, with an extra dpdt for passive/active and the usual p-retro setup.
Should give loads of extra tonal variety and still gives me those two basic passive tones which I like already.
Top stuff. Once ordered and here I’ll do a mini-upgrade blog here..