My Srl is dynema also, 7/64. I think its rated at about 1,500 lbs. I agree with your thought of not over stressing the system. If the trees r 12-15' apart that's great, but I've also gone with a longer reach when I had no choice. That's why I went from woopie to UCR. It just gives me a longer reach if I need it. I may go to a single line suspension on my next diy.