An adjustable seat belt rerouter system includes a cord, a cord length adjustment mechanism, and a shoulder belt guide. The position determination device calculates a plurality of second estimates of the positioning information of the terminal from the first estimate based on each dynamic model. A master feedback signal based on the speed and position of the servomotors is received by a controller capable of sending individual control signals to each of the plurality of servomotors so as to adjust the speed and positioning of the large mass. The valve assembly also includes a first valve and a second valve configured to respectively control the flow through the first valve outlet and the second valve outlet.