A line will distribute load equally all along it's length, Gordon, unless there is a change in the angle at which the load is born, as in the bottom of the hammock. So, coming in from the trees at 30* then bending to parallel with the ground at two points relative to the length of the hammock or your lie in it will change the load on the three quasi-segments. A tight SRL will begin to take up load, for instance, but is not really meant to do that to a great extent. Notice that on Stu's site it comments that the SRLs he sells assumes a 30* hang, meaning *conventional* suspension. He is careful to say how much to load it.
An *unconventional* SLS system requires at least a beefier SRL at the hammock because the angles are severly more shallow than 30*. The shallow angles put higher loads on everything in the suspension.
Now, materials rated at 1300# should carry 1000# loads. But why risk it?
I suffered a major, life-changing injury because a boat ladder broke from under me. It was supposed to hold 400# and did not. So in the park last week on that long hang I remembered all the pain I've endured. I am not going to let it stop me and I'll still think outside the box -- but I am smarter today so will order 1/8" and listen to my new friends here that have more experience than me.
Right now I'm enjoying hanging conventionally in my back yard. I've slept out there several times in various conditions, learning valuable things each time out.