I dont know as I havent used a silnylon tent yet. Is the stretch the tie downs. If so I may have a solution. I have about 800 feet of light nylon cord. This cord is reinforce in the center with several strands of Kevlar. The Kevlar controls stretch. If any of you Tarptent users, Would like to try some and test it, Please contact me . I would be happy send you what you need for your tent. Just let me know your test results!