I just posted an interview(my first!) I did earlier this year with Jules Standen, who was working at Matrix Studios when the Smiths recorded there. He discusses a lot of the recording process in-depth.
I'll keep it to myself just in case I can't actually make it happen. I hope I'm able to do at least a few more, though. It's no big secret... if someone worked with the Smiths onstage or in the studio, that's who I'd like to talk to.