Abstract: A system including a structure assembly and a delivery element extending between a free end thereof positionable distal from the structure assembly and a secured end thereof attached to the structure assembly. The delivery element is movable between an extended condition and a retracted condition. The system also includes a line element and a number of bracket assemblies connecting the line element and the delivery element. The line element extends between an inner end thereof secured to the structure assembly and an outer end thereof secured to the delivery element proximal to the free end. The line element is movable relative to the delivery element as the delivery element is moved between the extended and retracted conditions thereof, and is slidingly receivable in apertures in the bracket assemblies as the delivery element is moved between the extended and retracted conditions thereof.