I'm just in the midst of changing my tarp system around for my hammock and have a quick question. I am planning on using prussic knots attached to my tarp ridgeline, which I will attach to the D rings on my tarp. My question is this: can I simply attach the prussik knot directly to the D ring or should I be using some sort of S biner or something? I plan on keeping the tarp ridge line exclusively for use with the hammock and tarp (with Snake Skins) so to me it kind of makes sense to cut weight, to just tie the prussic's right to the D-rings. Does that make sense?

Thanks in advance!