How does it affect the rebound? If the cleft is low-density and a bat weight 2-10, one bat is thinner (old fashioned) and the other is a lot thicker, does this affect how the ball rebounds? Is energy transfer or vibration of the thicker bat (albeit low density) greater than the thinner bat? I don't think F=MA fully explains the characteristic of the rebound since the low-density bat has a larger surface area, more air-pockets in the willow for compression/decompression, and overall more flexibility in the wood to create the whippy affect. It is like a trampoline and wooden board (of same weight) but trampoline generates a lot higher bounce.
Thoughts?
Experiences?