I have a 10 foot tarp that I hang under the line with toggles. It is over my head and then I stake it out tight and the middle of the tarp ridgeline sags 8 inches and my head and maybe shoulders rub. How can I fix this? Can I put a loop in the ridgeline about the center and attach the tarp to the line? I don't see that in any pictures. Should I just not pull so tight? Should I try to get it higher to start?