I came across a page about the Tres Virgos Studio where Stewart recorded the Rumblefush Soundtrack. There are both stories and pictures from the recording there. I haven't seen this posted here before. Has some treasures about Stewart.
The main page is http://tresvirgosstudio.com/home
On the History page, http://tresvirgosstudio.com/history, there is a long and interesting discussion of Stewart's work on Rumblefish starting about 1/3 down the page.
The highlight for me was on the Pictures page, http://tresvirgosstudio.com/pictures, which includes several shots of Stewart from the making of RUmblefish with a few of Jeff Seitz.
Further down on the page after the other Stewart shots is a picture Stewart's letter to the studio owner annoucing the birth of Stewart's son Jordan. "Fingers and toes evenly distributed, male apparatus in the right place!" the new father proudly proclaims. The letter is the 3rd from the bottom.