Went running/jogging last night with my X2 (40lbs). The bottom of the frame digs into the top of my butt on both sides. I have adjusted the pack several times. All is well on long hikes ,even when loaded, if im just walking. However, i want the pack to be comfortable no matter what. Im guessing the more i load it ,the more it will dig in. I had some black pipe insulation at the house. I cut two 4 inch sections and wrapped around the frame at the two contact points. Feels much better. Anyone else had this issue or came up with a fix?