This is something I recently started thinking through in my mind and thought that there would be no better group of people to bounce this thought off of. So here it is:
In the past, hammocks like the Nano7 are made with ~1.1 or 1.0 and are very stretchy. I've made hammocks that are of this light material and they are stretch, to the point that it is hard to get a good lay in them. People going with this level fabric often go double layer just because it stretches too much for them otherwise.
These hammocks (I assume) are being built with the "standard" philosophy of +/-4 yards of material (I think some are as short as 10') to make them. If you take it as a given that the material is going to stretch, the more material, the longer the overall stretch.
When I built my latest Ghost II back in 2013, I considered it a throw away test bed of a shoulder box concept (here is the video)
One of the reasons I expected this to just be a testbed was this material was too light and stretchy even for me. But I ended up loving this hammock and have used it exclusively for the last 2+ years have been totally surprised by it. I have modified it some over the years, one thing was taking a couple of inches off the end when tweaking the design.
So with slightly less than 3 yards of this material feeling more like a regular hammock how does that happen? Yes, the "foot box" does help with that, but maybe there is something else going on. I've recently been thinking that if people made their ~1.1 to 1.0 ounce hammocks with less material, maybe the shorter the material, the less it can stretch.
What this might mean is if you are going to try building a single layer hammock with very light stuff, maybe you need to go shorter with the body to make it work right?
I don't know, I thought maybe some others may have already looked down this path and would have some insights.