Does anyone know a trick to erecting the military cot? I'm going on a Puff-Up campout with my two boys this weekend and have had a heck of a time getting the first one together. But they are tight, and comfortable. The two end crossmembers have bushings on one side and are blank on the other. I'm wondering if the bushing side is for when the material stretches a little after use. Then it will tighten back up. Any tips appreciated.