This is D. Jay Newman, also known as Dangerous Thing (as in "A little learning is a dangerous thing.")
I built several robots in from the late 1990's through the early 2000's. I had several articles and one book, Linux Robotics, published. Then my wife became extremely sick and I had to quit work to become her full-time caregiver. I was also forced to quit working on robots. Lately I realized I had to build things again or not be true to myself.
I've begun working on the troupe: Groucho, Harpo, Zeppo, and eventually Chico.