I currently have a Head LM Radical MP with a 4 1/2 grip size. I use the Gamma Supreme overgrip. The grips on my rackets are the stock Head grip that comes on the Radicals. I'm looking to make the grip size a little bit smaller. Can this be done by adding a leather grip? I'm thinking that a leather grip is thinner than the stock cushion grip. Is this the case, or am I completely wrong here? Is there any other alternatives? I still want to use my overgrip but would like the actual grip underneath to be a bit thinner. Thanks.