I currently have a BT1 and love it. The mountain rambler has caught my eye and I'm not sure if I want to put it on my bikini or get a duplex. What are your experiences with it either way? I thought about getting a duplex for the T1 and put the bikini on the lighter pack but worry about the the shelf loads or rifle bolt pushing through the bikini frame and creating a comfort issue. Opinions? Thanks guys.