The plastic spring (pic) wore out on Scott's Speedygreen 1000 lawn spreader. This meant that the lower hopper door which regulates dispensed product would not close completely. This resulted in unwanted dispensed product, and, inaccurate spreader settings. The culprit, a worn plastic leaf spring underneath the hopper, was pryed off the hopper door using a flat blade screwdriver. A small bungee cord was attached between hopper door and hopper lip (thru small drilled hole). Works great.