Excellent suggestion

. Even the 3600 bag isn’t overbearing during the day hunt style, and I can put 7 days of stuff in it if need be.
I used Cindy's for a few days on my SO frame and I liked all the pockets and layout of the 2200 bag a lot. Down at the bottom of that text was me referring to likely buying a K4 frame at WHCE since we have two bags and just her frame in the house. I think he would love it IF the frame fits him. I haven't ordered one because of the frame fit IF as well.
I very much agree with
@pods8 (Rugged Stitching) that webbing and straps are a significant source of overall pack weight. I think
@mtwarden gave a good summary of materials as well.
As promised.

Under the specs tab it says 5.25 ounces per square yard.
https://www.challenge-outdoor.com/ultraweave-collection
Cordura is very hard to track specs down. This is the only sheet I could find with the two same ASTM procedures.
500D Cordura Nylon is an industrial nylon fabric that is used in a variety of applications ranging from medical equipment to sporting goods.Technical Specifications:Test ItemTest ResultTest Method
www.eastexproducts.com

Here's a great example of what I meant by dilution of Cordura products. These are both stated as 500d Cordura; notice the differences in weight, tensile strength, and Taber testing.
DetailsCordura® 500D Mil-Spec Black is the industry-leading material when you need guaranteed performance in demanding environments. This 500 denier fabric is constructed using high-tenacity air-jet textured nylon from INVISTA™. After the nylon fibers are woven, they're then coated in both a...
www.sailrite.com

Here's a neat video showing the 2261 testing.
https://www.universalgripco.com/astm-d2261
Here's one for 3884
astm d3884
So, for me, "Cordura sucks" is part the relationship I have with
@Ucsdryder, part difficulty knowing exactly where in the range of parameters for "cordura" the piece of material falls in, a decade in textiles at Davis Tent, and using some of the UHMPE fabrics. In the specific context of the conversation he is referencing, I think he would have been sad with the purchase, and knowing him, I'm nearly certain "I can get it for a bargain" carried more weight in the attractiveness of the purchase than anything else.