sndmn11
"DADDY"
It's worth checking out the see outside options that don't use the revolution frame. They weight around 2.5lbs IIRC and I can attest that their frame design does a great job transferring weight to your hips. They also allow for a good amount of torso flexibility while being very rigid vertically. Less money than a full kifaru setup too.
I will second this suggestion. I have owned Kifaru, Stone Glacier, and now Seek Outside. It is the most adjustable of the bunch, and you could use the frame easily just by adding extensions.