the body of the vehicle below the protrusion 54 is a slit 56 which allows the steering ribbon 50 to flex as the protrusion is moved from one locking position to another slit 56 provides a springing effect to locate protrusion 54 within locking slots 102 shown in fig7 fig5 provides a view similar to that of fig6 in which the steering ribbon 50 is in a non obscuring position fig7 shows how the steering ribbon 50 interacts with other parts of the vehicle 10 to cause the back axle to become tilted when it is the trailing axle i e when the vehicle is moving in a direction away from the steering ribbon the right and left ends of the back axle 80 are each mounted in a slot 90 the right end is free to traverse the length of its slot 90 but the steering ribbon 50 has been positioned to hold the left end at the forward end of its slot 90 the chassis 20 of the vehicle 10 carries a steering ribbon locking bracket which in turn carries locking slots 102 these interact with the steering ribbon protrusion 54 shown in fig5 amp 6 to lock the steering ribbon 50 in various positions in this case the ribbon has been locked in a position such that it occludes most of the left slot 90 this occlusion can also be seen in fig6 the slide knob 52 is used to move the steering ribbon 50 between the lock positions established by the steering ribbon locking slots 102 and the steering ribbon slit 56 and the steering ribbon protrusion 54 both shown in fig5 amp 6 work together.