I posted this here now since the TW Staff has not answered this as of yet. I am thinking of cutting down my grip to generate more spin like Nadal and other pros are doing in effect. My grip size right now and normal grip size is 4 3/8 and I am thinking of cutting it down to 4 1/4. What is your advice on this? Can you tell me the proper way to do this? Would a local tennis shop probably do this for me? How much would they charge?