I use some 1,200 lbs surface tie down points as anchors for our hammocks indoors (my wife and I are full time hammock sleepers) but they are rather squeaky when the hammock is swinging and the walls are getting a little dented behind the d-rings. So I'd like to figure out a replacement, preferably one with no metal to metal contact. My initial idea was a continuous loop of 4 mm amsteel in place of the d-ring but I'm worried about abraision. Any better ideas out there?
Here are the surface tie downs in question:
tie downs.jpg
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