Included with the STS system is serving material. Though not likely needed, you can wrap this around your bowstring where it contacts the rubber stopper to ensure that there is no excessive string wear. For those of you who prefer not to serve your string, please use some extra bow string wax in the area the E.D.S. stopper will come into contact with your string.
Also, included in the new STS's is a BigJax rod dampener made by the BowJax Co. Slide this onto your STS rod to take out additional shock and vibration.
The new E.D.S. stopper is made from a softer rubber material to make it more quiet and more absorbing for noise and vibration.