Perhaps I failed to make it clear that I spend a great deal of time leading large often not very fit or outdoorsy groups across relatively inaccessible bits of southern Britain. Therefore I need to go prepared especially in the winter.
I'm very impressed with the capacity of the pack, its comfort and the huge opening making loading and unloading a doddle. I like the fact it's green (I don't do bright colours, it attracts the attention of the wrong sort of people like metal-detectorists when I'm working on a new site) and I need a sack that's going to resist a thorough thrashing from briars, barbed wire, flints and whatever else I choose to inflict on it.
Yeah, but still, would you please fill me in on how bringing the kitchen sink or an extra heavy pack would help you in the event of a casualty?
My number one priorities would be to notify the authorities and comfort the rest of the group. Nothing in a back pack would help me with that.
And if you choose to inflict that on your ruck you can like wise chose not to do it. There is always a way around, bushcraft is about being smart and skills, not thrashing through...