If youre looking to experiment, can I suggest the Head Synthetic Leather. It feels like leather but doesnt affect the weight/balance. So you get that firmness under the overgrip, which I really like in terms of feel. Just a thought as I am sure it would feel similar to a standard synthetic if you used 2 overgrips.
"Tennis is just chess with balls....zugzwang"
Prince, Dunlop, Prince....who knows...who cares.