This summer, on the CT, my total pack weight averaged around 13-17 lbs with a base weight around 10. Do you think that’s light enough for a frameless pack? I do agree that a frame is nice…makes it a lot easier to pack especially when you are in a hurry. I also don’t use a CCF pad (Synmat UL 7).
My ideal pack is (i) cuben, (ii) thin pad to prevent things from poking you and forming a rigid backpanel, (iii) thin bendable aluminum stays to fit your back. In theory, this could be done and be under 20 oz. HMG uses fabric that is a bit overkill. I don’t know of any manufacturer that can make this perfect pack for me. Love ZPacks but not the external frame idea. Not as comfy as my HMG. May just drop down to a Southwest or Windrider 2400 and be done with it..but that’s still around 26+ oz.