I know this sounds similar to another post, but I have a slightly different question.
Would it be fine to use only shock cord for the tarps four corners? Currently I have 16 feet of shock cord and was planning on cutting it in quarters, tying a fixed loop in one end for the tent stake, and a fixed loop to the tarp D-rings. I may also do just two fixed loops then a larks head to the D-ring. I figure if I stretch the shock cord to about 6-7 feet when staking, it would be loose enough so as not to break with a strong wind, but tight enough to keep tension on the tarp.
Do any of you experienced guys see any real fault with this?