I recently got the CTL480 and I got kinda big hands (and sweaty too), so I was looking for something like this, but in the entire wacom store there seems to be not a single grip that is compatible with the CTL480 pen, what do? ヽ(゚Д゚)ノ
Well the sweat is not the main problem, even without any sweat the pen often kinda slips away from the preferred position after just one minute, the sweat just adds to it .-.
did you try to tape it to your hand? or glue the pen to a thin latex glove so the sweat won't dissolve the glue like it can with the tape directly to your sweaty hand.