I just bought a CCW pack (Custom Chernobyl). It's ferkin awesome. I opted for the 500d spectra grid. It weighs EXACTLY what the site says. The Spectra grid weigh a LITTLE more than the straight up 500d, but I cut off some daisies and things so the weight ended up in the wash.
I hardly ever use the lid, so I almost had him make the lid using the 210d spectra grid fabric...and I wish that I had, but oh well. woulda saved weight comparable to a carabiner. significant, but not. better just to leave it behind abnyway.
My next pack will be a 210d spectra grid CCW Valdez, fully stripped. SO psyched on CCW.
As far as the 500d s.g. fabric...well, it's firts big day out, I ripped it! hahahah! but guess what? That day was an 8 mile approach through 4th and 5th class terrain in the Grand Canyon, hauling packs up funky slabs and through rotten chimneys. Did I mention that I had 65 lbs in that thing? Remember, if you are out in the Canyon for 4 days, you better have 4 gallons of water on you...
How did it carry? Well, let's just say that w/o a stay, it hurt, but so does carrying 65lbs WITH a stay, lov=bor day weekend in the Canyon.
500d spectra grid is the PERFECT belen of durability/weight and price. 210 tips the scale towards weight at the expense of (duh) durability and price.
I also own a Cilogear V4 45L worksack. It's on sale at the consignment shop. Sorry Graham. It's not you, it's me. really! Size lrg DOES NOT fit my 19.5 in torso (too big) and the dee clip BS is way to cosmic for me. I was sold on paper, but I like to think about the climbing, not my pack. also, both cinch grommets have ripped out and the sternum strap buckle broke. I've also broken two other buckles, one by slamming in car door, and one by stepping on it (it was cold out.)
500d rules.