This morning I built a mechanical prototype of Kahlo and brought it over to Allen at Touchstone3D. When I came back I looked into negative DC-DC converters some more. The module I had been using was a surplus item that is no longer available. I found a Microchip part, the TC1121 that looks like it will work and doesn't involve using inductors. The part is $1.05 in quantity 25. Lib and I went to the Farmers Market and got corn, eggplant and a watermelon. Some cute Farmers daughters were selling the corn. Dinner was eggplant parmesan with corn and Shiraz. Yum.