Couldn't justify ordering a Snugpak Endurance 40 pack since it doesn't have a frame or removable suspension that I could see; so I decided to buy 2 yards of 430D Nylon Packcloth (same material as ALICE fabric) in Olive Drab and lots of webbing and hardware....laid out the fabric, drew the patterns for the various components....most difficult part was just sewing the divider in the main pack body.... it is roughly 55 and a half Liters, and took me 3-4 hours just to make it..In hindsight, it probably would be worth buying an existing pack and modifying it.... Specs; Upper Main compartment; 12"x9"x13"; 23 Liters roughly Lower Main compartment; 12"x9"x9"; 16 Liters roughly Upper Side tunnel sewn pouches; 9"x11"x4" 6.5 Liters roughly Lower Side tunnel sewn pouches; 5"x5"x3" (deeper than standard 5x5 pouches) 1.1 Liters roughly Webbing on sides for LC gear Mounts via Ladderlocs and 1" straps Compatible with ALICE and Civilian Hiking packs, presumably also compatible with MOLLE frames of both 1603 and 1606AC types, but not compatible with the 1609 frame, At least I don't think so... PICS! On the Large Hiking frame Quarter view showing side pouches and canteen cover Top mounting system Bottom of pack; I might add an U shaped panel with elastic edge to cover the inside..... Drawstring panel on bottom Webbing on sides for canteens or LC pouches Large upper side pouch; same size as MOLLE Sustainment pouch, but with two buckles instead of one on ALICE frame, this is the reason for the specific measurement of the top and bottom attachment points; 18" from ladderloc to ladderloc...and 4" apart showing much shorter frame showing frame and stock ALICE suspension. top corner mounts Bottom corner mounts; uses same hole as the standard ALICE pack Bottom mounts; uses the slots of the ALICE frame; there's enough strapping to lash other things between flap and straps. Well there you go! Hope you guys enjoyed it! It will go on a trip pretty soon and depending on how it feels, I might do some more work on it, or leave it as is... As to what it has to do with Survival and Preparedness....sometimes you can't just buy something you need for your gear; so you scavenge fabrics and equipment to make your own gear... This pack is inspired by the British Bergen pack designs but in modern lightweight materials and with an external frame as opposed to internal frame; I am considering finding a working treadle cabinet/table for my 1920s? Singer 99 sewing machine so that I can sew without needing electricity (good practice for survival situations....also a good way to get paid/barter when people inevitably need to have something sewn/repaired. In short, it is a marketable skill and a very useful skill to know for situations, along with the skill to fix anything, everything, gunsmithing, automotive, scavenging. Also; this pack replaces my Hellcat pack I just sold.