I've seen some players attaching small rubber dampeners near the top of their racket strings. They supposedly absorb vibration for a more comfortable impact feel. As a beginner, I'm wondering if this accessory is actually helpful or more of a gimmick? For those using dampeners, did you notice a difference in comfort and control? Did it affect your power or accuracy at all? Trying to decide if it's a worthwhile investment as I upgrade my equipment.