Elen, you could make life very easy for your ridgeline by investing in a dutch fly and a dutch clip. UK hammocks sell them and they require no knots and stay rock solid. For dyneema for your ridge line i would go for 1.8mm stein throwline or marlow 2.0mm. dutch stuff works best with the 1.8. you can also get 1.75mm 'zing it' or 'lash it' from uk hammocks which is fine too
That stuff looks very good - I'm now spoilt for choices! Another cup of chocolate and a couple of homemade ginger biscuits is called for