Last weekend, I bought some elastic to re-thread some tent poles I'd raided from a Tesco value tent, to make a flexible pole 4.2 meters long to use corner to corner on a DD tarp. It made a huge living space by bending the centre diagonal through the centre loop on the tarp and planting them in the ground, pegged around 3 corners, and used a busted walking stick proping up the fourth corner. I then just pulled out the tarp and pegged the remaining loops on the ground. It was well enclose and kept the wind and rain off me for two nights. I wish I'd taken pics.