Underpad space-blanket wrap tested... briefly
Well, true testing has been delayed but a short silly test (30 minutes) at -5 C showed good promise.
I wrapped the underpad between two space blankets of the cheapest kind, taped the seams with duct tape. The fastening chords were exposed through small holes in the duct tape.
This leaves essentially an almost hermetically sealed underquilt.
It was easy to get into place under the hammock and also rather warm. I could lie there for about half an hour with two-three layers of clothing, using a -5 C sleeping bag as an over quilt. It was quite comfortable and warm.
So, once the good health is restored, I will test it for real. I plan not to use the undercover since it (in my eyes) is heavy and difficult to deal with. More about that later, perhaps.