Asking for a friend, he has a valley bar box.
Both are too fast. It's like playing pool on a knock hockey surface. Johnnyt
A couple years ago, Greg Sullivan of Diamond Billiards was exploring the possibility of having Simonis develop a slower "960" cloth for 7-footers, from the viewpoint that even 860 is too fast for 7-footers. http://forums.azbilliards.com/showthread.php?t=354656 [I wonder if that project is still proceeding.]