Sorry, I tried to upload a couple pics, but they literally took about a half hour each…gave up on pics.
Anyway, I don’t think of my pack as strictly a “pack.” It is a camping/hiking SYSTEM.
For example, The stays found in some backpacks don’t do anything except transfer loads during hiking (and maintain a packs overall shape/structure.) I replace those with two aluminum tubes with a carbon coupler. When I remove and join them, they make a good 36″ pole for the back of my tarp. The front is my 45″ hiking staff.
Another example: The sleeping pad replaces the normal sitlite pad in my packs. I have a couple made up in 3 and 5 layer. Without the stays, they easily support 20 and 30 pounds. (‘Corse, this also voids any warranty from Gossamer Gear being 10 pounds over their recommended max…) It also doubles as a sleeping pad. Each 1/3 point on the pad is supported to prevent any buckling/loss of support. It also adds good padding for my back.
My dry compression bag used for my sleeping gear (bag, jacket, long johns and sleeping socks) doubles as my pillow. My empty back pack is rolled up and put inside it after turning it inside out to make a pillow. (My hiking cloths are usually rinsed out and hanging to dry if it isn’t raining.)
Excess strapping (after determining my maximum size/length needed and adding on 2″) is cut and burned. Danglers have a way of snagging on scrub and crap on the trail.
Plastic is heavy. Once you determine your size, I cut off various D rings, remove zipper pulls (replace with a cord knoted at each end, then cut and burned.) Pole keepers are removed along with ice axe holders. Daisy chains are removed (I don’t ever use them.) Hip belts are made up and stitched to the pack, usually removing any hip-pocket straps and anything more than 1″. I wear a belt all the time, I don’t need padding for <30 pounds. Stitching is lighter than lock buckles, loops, “Siamese” clips, etc.
The torso strap is removed and a doubled (stitched together) piece of elastic is used along with a small clip. It is simply doubled around the shoulder strap mounts as I stitch it together. It slides easily and stretches with my breathing. Much lighter than a factory arrangement.
Any compression loops, cords, etc, is simply cut off. Never needed them.
I can usually scrape about 2.0-2.5oz off a pack with better functioning/faster adjustments overall. The removal of all the buckles/D-rings, and other plastic pieces makes it a more comfortable pillow at night, too. But it helps to turn the pack inside out.
For those items that CANNOT be dual-purposed, I get the lightest/smallest item available. For example, my stove is just a stove, so I have a 3oz Caffin winter stove. I need at least a spoon, soo, I bring along a ti spoon. My pot is only a pot. So, a 3.25oz 1qt grease pot works. My Steripen is only for drinking water at 3.5oz, total…no tubes, no sore cheeks from sucking, no problems with cold weather (I put it in my pocket,) no setting up a gravity filter or backflushing every use…