This invention belongs to the field of wind propelled vehicles. MROMs for storing boot programs and other Read Only code are formed by cutting write connections or not providing PCB socket leads to MRAM write pins, or by using memory hubs to prevent writing to MRAMs. A rigid component is disposed on the backrest and extends about the recessed area thereof. A long hole extending in a biasing direction of the actuator body and into which the holder is fitted is formed in the support. A distal end of the conductive pin includes an electrical contact surface at the distal extent of the pin and which intersects an axis of insertion in the pin aperture.