Hey guys, Nate Alder here, Found & CEO of Klymit. We hear you loud and clear, and I love the thought process.
We actually have a pretty amazing prototyping machine in our office that allows us to create almost anything you can imagine. It also allows us to do simple projects like turning a the Inertia XL into a 3/4 length pad. Although it is not a standard product for us or available on our website, we are happy to turn a pad into a 3/4 length pad for you. Now we haven't made one like this yet, but I will try to test one out to see what weight it will come out to, I imagine it will cut a decent amount out on weight and pack size :)
Just give us a call or email us and we can work that out for you at no extra charge :)
Office: 888-559-6481, just ask for Nate, or our R&D manager Matt