Thanks for that great info. Always wondered about the Prolite stuff.
Seems like Paul Nanian was right all along.
You can do some simple math to figure the square yardage needed for your pack design,
then multiply by fabric wt per sq. yd. to compare weights. I do not think there is anything as light weight, water resistant, flexible, durable and sew-friendly as good balloon cloth; so that's why I mentioned it to you. Consensus is great, but sometimes you have to chart your own course to move the ball ahead.
If this sounds like eating my words, OK, it is.
Was under the impression that the VX07 was a lot heavier than 2 oz. Have looked at WX and TX that are or were very light Xpac (Dimension Polyant) products and are over 3 oz. They did not seem very durable, especially when sewn (same issues as Cuben). Lightest Xpac Rockywoods has sold was around 5 oz. The Cuben 'Hybrid' from Zpacks at just under 3 oz. looks better, but is very stiff, and when sewn looks like it might break the thread. Anyway, not ready for that, or for a bonded carbon fiber container either. IMO, flexibility of the pack material is essential for durability, not to mention ease of use. The balloon cloth is lighter than the hybrid, anyway. It is used by folks who think nothing of spending around $100K for a balloon, so is probably the best material they can get for outdoor use in a variety of adverse conditions. Would be interested in hearing about any Xpac or Cuben Hybrid balloons if there are any out there, though.