I meant to add that part to the last post.
My very first, (now scraped) quilt was made with 1.1 DWR.
I did not have it around to compare it with the Momentum.
The 1.1 was warmer than the .85 DWR and I would put it just behind the Momentum.
Wind resistance was actually fairly good with the 1.1 DWR, however any dew at all would stick and throughout the night get the fabric soaked enough that even some, (not much) of the down would get wet.
If you are using the 1.1 DWR in perfect weather or shorter trips, the 1.1 DWR will do you justice.
On the other hand, Momentum is a far superior fabric and if you really want to rely on your bag and don't want any problems, Momentum is the way to go.
If you are going to spend all of that time making your gear, the extra $$$ you spend for a better product that you will be much happier with far out weighs the price difference.
I scrapped my 1.1 DWR quilt because I wasn't happy at all with it. What was left over after scrapping it became a dog bed, (my dog is sitting on it in my I.D. picture).