no more overgrip. i am considering this change because i found i like the thickness of my 4 3/8 just right without any overgrip. well it improves my forehand a lot. however it causes blisters despite being non-leather, but i think i can live with that once i develop some callouses. how long do these replacement grips last in comparison to over grips? same lifespan or about 2-3 times longer?