This is a new veion of the parameterized Servo wheel for mobile robots: http:www.thingivee.com/thing:9071 These are the wheels used by many printbots such as Miniskybot or Scout. The improvements of the Veion 4.0 are: Adaptation to the 3 types of Futaba 3003 servo hor: rounded, 4-arms and 6-arms New drills for attaching the hor. Now it is easier to screew the hor to the wheels The sources are stored in the Miniskybot 2 github: https:github.com/ObijuaMiniskybot/