Luke, I'm having Zimmer make me a pack largely based off of yours - thanks! I was using the pictures on his site to help illustrate features I'd like and more and more referred back to yours. As luck would have it, while searching the web for additional images I came across this thread. Lucky for me, but probably not for you with all the questions I have.
Above you mentioned the dimensions of the pack at the bottom are 11" x 7"; does your pack taper? If so, what are the dimensions at the top, before the extension collar?
Also, you mention that you wanted the frame as close to the back as possible. What was done differently by Zimmer in this regards?
Anything you might change?
Thanks for your time.