I use a giant Prince dampener from the 90's that completely stretches across strings at the bottom. Tried several others including the Gamma Redeye, Buzzkill, and TNT core dampener. They are OK but not the feel I was looking for. Still default to my old Prince...I guess I like a really board feeling racket.
Head, shoulders, knees and toes (knees and toes)....all of it hurts