I know many here love their hardware but I think I've settled on my ultimate, hardware free, easy to build and very easy to set up tarp suspension system.
It consists of separate lines on each end of the tarp. i.e. not a continuous ridgeline.
Each line is larks headed to the tarp.
I take the line around the tree then back to the tarp creating a V.
Each line is fitted with a prussic loop that has a large stopper knot on it's end.
I push the stopper knot through the loop that is larksheaded to the tarp. Then tighten the prussic.
It works like a button hole. Under tension it holds the knot. The 'button hole' can be made smaller if necessary by simply tying an overhand knot.
I find this system quicker and easier to use than figure 9s or any other hardware I've tried. It's lighter, obviously, and easily repaired in the field. Although it has never failed on me yet.
I don't claim this as my own invention. All ideas were gleaned from HF expertise. No doubt this system has been described here before anyway. But I think it's worth repeating for all those who think they can't hang without hardware.