Zing-it - What diameter recommended?

[samjaynes]

I have built about 5 hammocks so far, and went with whoopie slings on the majority of them, but the one area that I went cheap on was the ridgeline. I simply grab my 100' of 550, and added ridgelines.

Now, I am looking at creating a uniform fixed ridgeline and have been looking at supporting ReddenMarine and their discount they give us on Amsteel. I see two diameters of Zing-it offered... so hammockforum, what do you recommend:

1.75 or 2.2?

or, do you recommend another line (although I like the yellow color of Zing-it, and struggled to find other tech lines)

Thanks,