One of the problems in using the stock tarp attached to the hammock is the tarp sagging when you enter the hammock. The use of a tarp ridge line can keep the horizontal axis tight but the flaps will still be loose. Of course you can attach some kind of weight to the wings and because it is free floating it will keep the tarp under tension. But I was thinking that it would be very convenient to simply set up the tarp attached to the hammock, get in and adjust the tie outs to keep the tarp taut. It would be easy enough to rig up a system where you can do this. But the problem is what happens when you exit the hammock. The tarp must ride up with hammock however the wings are secured to a stake. I don't believe that shock cord would have enough elasticity to allow the tarp to float freely. I was thinking that using surgical tubing as a bridge in the line might be a solution. It's really strong yet elastic and comes in various sizes. Not sure of its cost. I see there is a tensioner that uses an elastic that's been mentioned on the site but this may be an alternative.