Thanks, thats great info!
The one I'm looking at is a 4500? and it has purple straps.

I promise not to butcher it, but I was wondering your thoughts on the pack for scrambling/technical climbing? I know the Cliogear's carry well for this, but I was wondering about your experiences with the Cloud?

Do you find you can move easily, and twist from side to side, when wearing the pack with just the foam pad inside? Can you reach overhead, across your body and too the sides?
Does it carry well when less then full?
25-30 pounds will be the maximum that I have in it for climbing. Usually more like 15-20.

Sorry to ask so many questions, but there's almost no info on this pack!