Well it might be my imagination tricking me, however in practical use, i do find this design to be very simple, durable, leightweight (as to that it can be divided) not to mention fairly easy to make and maintain. (And it looks good aswell)
I have added some discription to the scan only for you english-speaking users. (arent i a nice chap
) (edit: Allthough the text is very small :11doh: )
it does have quite a few years on the back this design, but it works brilliantly, and with a bit of fiddling about over time, you'll figure out a way to make inlays to render it possible to combine them even further.
I have seen the "true" version of this, been put together in a snail-like structure, where the individual tarps where standing upright. That structure was expandable endlessly, thus giving room for everything you would want, so possibilities are definately there