I’m starting my 7th pack and each pack has been more complex and refined then the next. The one place I can’t seem to figure out from pictures is how folks are creating the curved seam on the back of the pack to connect the top of the shoulder straps. Many manufacturers do this in certain ways, but the pack below shows it off the best. Anyone experience with this? can you explain how you successfully create this seams? when I do it I have been basically doing a flat felled with the top and bottom pieces cut with the same curve when “right” sides are facing. Sew the seam and then when I flip the top part up it looks fine BUT it creates an equivalent curve in the back panel creating a convex panel pointing toward your back. Hope I am explaining this so it makes sense.any assistance is appreciated.
The way I have been doing it for my previous packs is attaching the straps to a straight seam but angling them out some. This sort of helps but it still makes the pack not follow the natural angle of the shoulder.
My most recent pack you can see the straps attached on a flat seam but angled out
