Got my ENO Doublenest hammock, just going to stick with ultralight carabiners and some webbing. But, I would like to have a ridgeline. Going to get a 4 season Maccat tarp with doors, and need a ridgeline for that, at least, I think. Does a ridgeline help with maintaing the hammock taut and comfortable, or is it just personal preference, or do I need it to hang a hammock? Remember, I'm a noob.