1. add one more overgrip, but will not easy to feel the grip side if u use 2 thick overgrip at the same time.
2. change to use a thicker cushion grip
3. use a cheap overgrip, cut it to fit for each grip side, use double side adhesive paper to fix on the grip, then cover another overgrip as usual
Sell racquet is ok ,but although the racquet look blank new, the selling will be 3/4 of the buying price. so changing grip, heat shrink sleeve or use one more overgrip is a cheaper solution. Understand use one more overgrip will lost "八角型", so my 3rd suggestion will be a cheap solution and the "八角型" shape will not lost....