Geez I can't believe how many things just kind of break down on a robot. B9 has been sitting for awhile so when I fired him up, there were quite a few big problems that I've been addressing. First one and most annoying was a loud hum in the neon/audio system. It turns out just separating some of the wires takes care of that problem. And then the ear motors stopped (still haven't figured that out yet) and one of the chest lights drove me crazy (turned out one of the 12v automotive flashers burned out.
So other than the ears, he's ready to go. I'll try the ears a few more times but that may just be one part that remains stationary.