Please correct me if my assumptions are wrong. 1. Overgrips are used on top of your standard badminton grip/replacement grip. 2. It's to make it easier to swing the badminton racket. Do overgrips feel better? Do I need to replace them often? How well do they absorb sweat? (let's assuming I'm using the Yonex AC102) Can I put one over any replacement grip? Like say a Yonex high soft grip? Will the overgrip damage or leave glue marks on the grip underneath it should I chose to take it off? Any other benefits of using an overgrip that you care to share? Thanks!