Sorry for the lack of reply. I didn't get an alert to say the thread had been updated.
I met Justin (top guy) and we discussed options. The mixer has a few wider issues around the summing amp so I'll not be doing the work myself. I think my project will be to build an external power supply. That way I'm not messing with the mixer too much but can still get hands on.
I'd also not seen your article on your Bozak rebuild, Vinyl. Just wow. That's super impressive.
I'll post pics in the next few weeks.
Thanks all once again!