http://www.huntingnet.com/forum/tm.aspx?m=2005725&mpage=1

Its really ez to do it yourself, You must stretch the string tight and the instructions above are great. I use a ratchet strap to do mine, You can do a search for material, Halo serving is best but I am useing regular serving and get around 200 shots maybe more never counted.

Good luck, Stosh