As the title says, this is the beta version of the pack duffel. (The prior version was just proof-of-concept.) The pack in the picture was filled with assorted bedding to approximate the shape and size of a loaded pack, and the hip belt was clipped around the pack instead of flying free.
The length of the bag was taken in somewhat and the height of the end panels was diminished a little. The stow pocket was not altered.
(I didn't put the top zips back on for the test fitting in this version. I was already satisfied with that part of the bag.)
Onward and upward and all that stuff.