Hi All
A couple of things.
First, when I made my hammock I could only get about 6ft of webbing from a local camping store and found it too short to tie to the trees in my front yard so I bought a couple of cheap 1in wide ratchet tie downs and used the longer end as my new webbing.
Well I set it up this morning over the concrete floor at work here and once I got in one end broke
So for testing of the ridge line I doubled it over and all was ok.
I then attached the new thinner ridgeline and pulled tight on the webbing through the rings until the ridge line was tight and with about the sag that I liked, but when I got in I found that something must be stretching because the ridgeline sagged down to near my head.

Can anyone suggest what could be stretching and causing the ridgline to sag so much?

A bit long but thanks for any help.
gunn