Camper1 : Jakerock was referring to
ridgelines for the HAMMOCK - the CJH does not need a structural ridgeline to help set it's proper sag angle. But many of us owners have installed NON-STRUCTURAL hammock ridgelines between the loops located at the head and foot ends. Hang lights, organizers from them or use the line to keep the net/weathershield off your face if you partially un-zip it.
As for continuous ridgelines for your CJH tarp, they will work very well. As IDCakes has pointed out, the Dutch system works very well. It allows you to string the ridgeline and adjust the tarp fore and aft to best cover your hammock. And it does offer another dry lication to hang clothing.
Jim