Hi Derek,My time with Don was a brief couple of weeks back in 1975 just after Bongo Fury was released. My dear friend Elliot Ingber (a.k.a. Winged Eel fingerling) told me Don needed another guitarist for there upcoming European tour and I should check it out. So I went down to the rehearsal studio which was on Sunset Blvd near Gower St. It was actually Frank Zappa's headquarters of offices and rehearsal rooms. I went in the room and Don was there along with John French (a.k.a.. Drumbo). John and I jammed for awhile maybe a half hour or so playing spontaneous riffs and grooves. At the end of that jam John said "we've had over seventy guitar players come in here and you are the only one who has the feel we need you've got the gig if you want it" I knew some of the other guitarists that had come down to try out and many of them where very well known and monster players around town. I felt very flattered to say the least. Rehearsals began shortly there after and continued on for about two weeks or so. It was John and I mostly going over the tunes and feels together while Don sat in a corner of the room and drew in a coloring book with magic markers coloring on the reverse side of the pages.. an interesting technique. He would stop coloring sometimes to voice a comment or whistle or sing a specific lick he wanted played. At one rehearsal I was deeply concentrating on a specific passage when I turned my head and Zappa was standing right next to me with that typical intense look on his face scrutinizing what I was playing. I stopped playing and we started talking and he said he was impressed with what and how I was doing with learning the parts. Which by the way had to be played exactly as written or the song would not work. That afternoon we all went across the street for lunch at a Mexican restaurant, Frank, Don, John and myself. I believe the cover shot of Bong Fury was taken at that restaurant at one of the booths.