I slit with a knife, make the slits going with the length of the hide not to big, just big enough to get string through , I make them about an inch off the edge , maybe a little more around the belly area, make sure the hide is wet and will stretch, also as you tighten it pull on the hide not on the rope, pull the hide at the hole to stretch and slip the rope through. Hope that makes is clear. I make holes every 5 or 6 inches apart. Pappy