So all the models of the Dana externals have the same frame design and just have different bags?
Correct, most of the time. I say this because I have seen a couple Dana Externals where the bottom of the frame loops back underneath the pack body. I'm not sure when this change occurred, or if that change was more than for a season (or two). For the most part, they're all working from the same frame and just changing the pack body configurations.
