I found a good tutorial on the mechanical of building a robot arm. Perhaps this is a good place to start before I start building 6×3=18 servo robot ‘spiders’ (I know, they need 8 legs…). Here’s a video of some industrial 6 DOF robot arms (it took me a while to spot the 6th!) used for frivolous purposes (as they should be!).
YouTube – Robot Arm Bowling Competition