RecPit

Found this little gem about Zappa's live gear. The author writes like a prick, but there's some interesting stuff about how much thought, effort and money went into making it sound amazing.

http://www.afka.net/Articles/1978-09_Studio_Sound.htm

Some interesting stuff in there. FZ was a perfectionist, in a somehow very reasonable way.

Here's a Tommy Mars interview. Lots of synth talk if you're into that:
http://www.zappasgear.com/TommyMarsInterview.html