Interesting weekend. My digital camera is broke or else I would include pics. My semi-scientific results are that my down is 600 fill. The semi part comes from the fact that my scale is not overly accurate. I weighed out 1 ounce and then put it in a 7x7x20 cube that I made and measured how high it was.
The biggest discovery was that working with down is a serious pain in the butt. I think I came up with a method for working with it.
Now time for getting materials and making a pattern.
Scott