I think that the zpacks cuben fiber ground cloth design is awesome with the "bathtub" effect. I am new to tarp camping and have never understood how one is protected from rain (sheet flow) by using a flat ground cloth. Joe's design seems to address this problem but I don't want to pay $100+ for a ground cloth so I was thinking of trying to make something similar with polycryo or the kite-making tyvek. I'm wondering if folding up the corners and sewing would be best (seems like it would be hard to sew some of these materials) or if I should be taping and if so what kind of tape I should use.
I would of course love to do this with cuben fiber but as expensive as the material alone is, I'd rather just pay Joe to do this if I were going to go with this material. I appreciate input here!

