I've been playing with a few Prince O3 Tours for several years, using the stock synthetic grip that they came with and Tourna-grip overgrip. After seeing it suggested that a leather grip could help make the bevels more pronounced and ease switching grips for a 1HBH, I decided to give leather a try instead (still with the Tourna-grip on top). As it turns out, I did find that the sharper edges do help me find my backhand faster under pressure. Unfortunately, the two rackets with leather grips are killing my arm. I'll hit with one of them for 15 minutes, my arm will start hurting, and then switching back to one with a stock synthetic grip almost immediately relieves the pain. If it hurts when you do something, stop doing it, right? I'm just curious if I'm losing my mind, or if anyone else has seen this problem? It seems surprising that the grip would make this much difference.