I was inspired and went out and made one of these after reading this thread. I went for the diamond approach. I think I might have went a little overboard on the tape reinforcement.... Put a strip on both sides, down every edge, through the ridgeline and overlap areas.. (err on the side of strength, I guess). After all is said and done with, the tarp came in at 1lb 14oz with an 11ft ridgeline.