I have a stabilizer kit from HI-tek sports. I use arrows to make it what ever length I want and can add what ever weight and vibration damper to it. Mine is 7" long (not including the weight), Fuse stealth discs, 4 oz weight and weighs in at 7.8 oz.
I have had Kifaru dubplex and bikini frame and now have the SeekOutside frame. I like the Seekoutside pack frame much better than the kifaru. It fits me better, I can adjust the frame height on the seekoutside, the seekoutside pack frame is just as durable as the kifaru and it fits me much...
everyone keeps talking about how it sounds so revolutionary and new.. . everything that is being described sounds pretty much like a Seekoutside pack frame.
The only way to pick one that fits your body properly is to try them ... I have used Kifaru, mystery ranch, kuiu, eblerlestock, badlands, sitka and SeekOutside. The SeekOutside is the one that fits me best and feels the most comfortable from being a day pack to packing heavy meat loads.
we have had elk come right through camp with no ill effects. They move around a lot. We always have camp close to water, in a spot free of dead trees and where we don't have to worry about standing water if it rains a lot.
if the farthest you are going to be hauling a heavy load is 1/2 mile I would not waste money on a high end hauling pack. Look at horn hunter, some sort of molle pack frame suck as wilderness packs, LL Bean makes a frame I believe the cache hauler, kuiu would be another good option.
I switched from Kifaru to Seek Outside. Kifaru and other packs with the thick lumbar pad just never fit me right. I really like my pack, whether I am using it as my daily hunter or hauling heavy loads.
I just switched from Kifaru to SeekOutside. I am very happy with the change. Research them and if possible try some. If you can't You will probably be happy with what you choose.
I have one I just got this spring. I have only used it around the place here with about 70lbs in it with no complaints. So far I actually like the hip belt and lumbar pad(or lack of one) better than my kifaru.