I had some B9 ear motors in my hand, but they are too small for his blade hands. I'll need something with a little more umph. Right now the hand parts are all resin, but once I get him all finished up I'm going back and have a few parts machined in metal and the blades laser cut stainless. So the motor is going to have to be sturdy. First just to get him finished for molding, it's taken far longer than I had hoped.......