hm yea it depends on the fabric, maybe I´ll have luck with the downproof poly fabric. In this case its´learning by doing^^
Often they use too light fabric, right? What do you mean with 10mm silk for your hammock? How heavy (erm, or light) is it?
Silk is pretty tight woven, isn´t it? Its worth trying...
I suggest it´s Frankfurt at Main, there is a castle Königstein / Taunus near by. Nice Place