A method may include articulating a first link and a second link relative to each other about a pair of outer hinge portions on a first end of a first link and in mating engagement with a pair of inner hinge portions on a second end of a second link. Each outer hinge portion comprises an outer ear extending in a first axial direction away from the first end of the first link, and an inner bearing surface substantially oriented in the first axial direction, and each inner hinge portion comprises an inner ear extending in a second axial direction away from the second end of the second link, and an outer bearing surface positioned oriented in the second axial direction. During the articulating, the outer bearing surfaces support the outer ears and the inner bearing surfaces support the inner ears.
