For me, at 70ish I'd much prefer an internal. The barneys moves weight away from the cog and for some reason gives me dead leg. I have to pop the belt to get blood flow back, which of course means your shoulders will be bruised to hell.
Haven't had that issue with the sg packs. If that is what you are experiencing with the kifaru, i would play with belt tightness and test some other packs with the same load. I still use the barneys pack a fair bit for heavy but for short meat hauling when not in the alders. They are way easier to tie random loads like a sheep or moose head too.
