fat grips
I too, suffer from the larger hand malady. I have found that the old style Pro Grip is the way to go, the Model 737 Enduro to be exact. I have used that grip for almost 10 years now and sometimes it helps and sometimes I still exit the track looking like Popeye after he pounds a can of spinach...but they do take out some of the vibration I believe. Nothing beats consistant training. I'm sure you have heard all the old ones too like don't hang on so hard, relax in the air, squeeze with your legs, and breathe more. They can help too. Good luck..