A hearing assistance system having adjustable bulk delay for cancellation of a time varying acoustic feedback path. The exo-skeleton may assume contracted and enlarged conditions, and includes one or more serpentine elements, each extending both peripherally and axially along at least a portion of the peripheral wall. A gate dielectric layer covers the substrate and the gate electrode. By substitution of alternative compression springs provided in an aftermarket kit format, the present replacement actuator feed limit valve assembly will function in either General Motors 4L60E or 4L80E early and late design transmission valve bodies. In yet another embodiment, the cookware comes with at least one adjustable leg permanently attached. The tower comprises a mass assembly suspended by suspension apparatus from the tower such that the mass assembly is movable to and fro in relation to the tower.