For a 300 lb tent load that's putting roughly 1000 lb tension on each tie (though they don't show any pictures of how much it sags to allow a better estimate of

For a 300 lb tent load that's putting roughly 1000 lb tension on each tie (though they don't show any pictures of how much it sags to allow a better estimate of the angle). Not good for the trees and not comfortable to consider the failure modes. Slingshot? http://www.engineeringtoolbox.com/rope-angle-tension-increase-d_1507.html http://www.engineeringtoolbox.com/rope-angle-tension-increas...