happy_face, glad you finally got it up and running! It was hard to fit the Activators in my Telecaster Bass as well - the pickguard was bulging up a little bit so I had the luthier route the control cavity a bit deeper. The funny thing with the Tele is, in a way it's Ric-O-Sound only, since I had the original humbucker wired separately with its own output. And actually, now that I think of it, he used a jack plate from a Rickenfaker!
Looking forward to sound clips, pics, whatever ya got!
Oh yeah, RE: S models - as far as I know, most S model basses were mono, but there are always exceptions!