I am considering to use Luxilon rough for more spin friendly string. But I do not know which string position is better for more spin: main position for Luxilon rough or cross position for the string? In other words, if I use very spin friendly string (such as Luxilon rough), where should I string the Luxilon rough on main or cross? What different is that when I use the rough on the main and when I use the rough on the cross? I usually use Hybrid, poly and natural.