I'm considering the purchase of a Blackbird 1.1 double hammock and a Z-pack standard cuben tarp and modifying an REI 700 fill down bag to make a top quilt with the assumption I can reduce it's weight from 35 oz to 28 oz, and using the Exped Synmat 7 UL pad I have as bottom insulation. If this will work I wont be adding anything to my current set up weight using a tent. My concern is with the pad, would it do the job in a hammock, works great on the ground.