I keep track of my time and I have about 25 hours in that bag. The hard part was sewing the front and back to the gusset and then turning it. It was one laborious stitch at at time, and it actually took the better part of an hour to turn it. I used glue (Super 77 and Titebond III) to hold everything together while I stitched. I shouldn't have used the Titebond III. I should have used Titebond I or II. The Titebond III is water proof. Fortunately, I only used a very little bit of the Titebond III. The Super 77 came loose when I soaked the bag in warm water to turn it. I know I could dissolve the Titebond III using vinegar, but it wasn't enough to worry about.
I should note that I am using diamond chisels now to punch my holes for stitching. It makes the final stitch for the rolled bindings much easier than it would be without the chisels. I just hold the chisels (2, 4, or 6 holes) tight against the binding which is glued in place using clothes pins. I should also note that Ken Scott's video was very helpful for providing the techniques necessary to assemble this bag. I had to watch it a few times though as I was making this bag.