Also pultrusion dies (including injection type), fiber creels, forming guides, resin baths,
overwinding stations, mat slitters, flying cutoff saws, drill stations and notchers, roll-off tables, routers, trimmers, and other auxiliaries.
An endstop mechanism prevents
overwinding. FreePlay estimates that the spring will last 10,000 full wind/ unwind cycles, giving off 5-10,000 hours of listening time, depending on volume.