Try to be faithful to primitive archery and using all natural materials, even down to the string, I have had a problem with my plant fiber strings wearing out. I came across an article online about the Turkish double loop. It's so simple and genius so I tried it and I really really like it. This evening I did a quick how to on it to make it easier for other folks that want to use natural material strings without them wearing out so fast. The video link is below and you should try this on your bows!
Click on the picture!