My current pack is 23 years old and is nearly at the end of it's life. I am looking at replacing it with one of these Eberlestock J34 packs. I generally do a lot of hunting from tents, typically a 3-4 hour walk with all the gear, tent, cooker etc. So far I have only used the traditional one compartment type pack. Has anyone tried both these packs? I am particularly interested in what type of harness system the J34 uses. I have seen the J107 harness on their website. I am 6' 4" and 190 lbs. How do these packs feel when fully loaded with the spike camp duffel attached to the back of the pack, they look a bit like they would pull back a bit. Any pros or cons of either model would be greatly appeciated. Thanks, Stu.