Ran a couple bags this year. Started with Eberlestock F1 frame with F2 bag I believe. Didn't much care for that setup, bag was way too small and there was no lift from the frame at all. After that trip I picked up a gen 2 duplex and attached a Kuiu Icon Pro 7200 bag to it. Not a bad setup but just didn't quite trust the attachment system if I were to have to come out heavy. Replaced the Kuiu bag with an Argali, spotter pocket, couple med pouches, guide lid, and grab it 2. Love this setup, just smashed everything down and took it out on a fly fishing day trip last week and it worked great. Sold off some gear this week and ordered a new UL duplex yesterday to swap my older duplex out for. Could have saved a lot of money if I just listened to everyone here and bit the bullet on Kifaru from the start! Guess that's part of the learning process though.