The GB 10.7 coverstock is very versitile,and could be easily altered to handle all but the heaviest conditions. I have one that is at 2000 with a pin down layout, and is the first ball out of the bag on league night. When the pattern breaks down,I can then switch to my pin up Cyclone which is at 4000 grit, and heavily polished.They make a very nice 1-2 punch.