I missed 'em. I still have a tender spot for Live at the Fillmore East. A chorus containing the line "talk about your hemorrhoids, baby!" is pure Bach.
Yes, I admire Frank Zappa's musicianship and skill as a recording engineer. I purchased one of his LPs when I was in my 20s (Hot Rats).
By the way, you mentioned that line about the hemorrhoids here on FR previously, on this thread, back in June of 2006.