Here's an interesting piece of string information I picked up while I was visiting the vendor booths at the Australian Open. In the Klip stand, the rep told me that the drought here in Australia really affects the quality and durability of the gut. Makes sense really. Happy, well-watered cows = good gut. Maybe natural gut sources from a country / area with high rainfall is the best option? So next time you go to purchase some natural gut, ask the stringer what the annual rainfall is in [insert country name here]. Then watch the expression on his face.