Added a lip to the collar tonight. The lip is made of scrap acrylic and fits just inside the top of the torso opening. It's attached to the bottom of the collar. Until now, the collar was just sitting on top of the B9. Now if someone bumps it, it won't slide off accidentally.
I got to do something similar for the radar unit. That also just sits on top of the collar.
In other robot news, I officially started working on the futurama robot Bender. Well, kinda. I started hacking away at the resin tank that was in my water softener to shape the tank. This is going to take some work.