>>1276424didn't do much as there wasn't that great weather and i like to work in the forest with a real set up.
but i cut down the shape a bit more, less foam at the legs. only left a bump (yellow arrow) for the knee for when i like to angle one leg up. might cut away more around the head area as there is some 5cm extra but im gonna test it first with a night of sleep once i get some colder temperatures.
same with the wave in the red area it does not really make a difference in comfort, but i might be able to save a few grams.
i did some tests cuts on the foam leftovers to see how to best make the z lite style folding mechanism. it does lose a quite a bit of strength but there seem to be little wear on the material if one does not abuse it. it won't last decades but still pretty good. maybe i can reinforce it with stuff like fiber tape if necessary. additionally im making a cardboard cut out i test folding patterns/geometry. though to be honest i'm not sure if it even makes sense, its very easy to roll up and it's not going to get that much more compact.