Go to Wawak.com. Jake Elliot recommends Maxilock a lot, but to be able to sell your string it needs to be good- something not so simple to make anyone can do it. So try other materials and thread as well. Put this string between two wall hooks ~10 ft. apart, back and forth ~6 times. Drill for as long as it takes to shorten ~10 in. Tighter string is whippier, thinner holds tension better. Xela: m.youtube.com/watch?v=82pigIyESOg&desktop_uri=%2Fwatch%3Fv%3D82pigIyESOg