Thanks for the photos! Much appreciated!!
It looks like it's roughly 8.5" wide, 7/8" (just shy of 1 inch) tall/thick like a tube. A shot or two of it in the Mini 10 would be most helpful to get a feel for how it's situated and angled.
Anguish - comparing my 9 to the 10 mockup (with 3 cell) I have it appears to be nearly identical in size other than being almost exactly 1 inch wider. It's just as tall/thick and the length from nose to hinge is maybe 1/8" longer. Does this sound right to you?
Trying to accomodate that shape in a sleeve is going to be interesting. There really is no way to put it in battery first like normal without having a lot of excess material. My plan, I think, is going to be making an allowance for it where I place the front edge so that the battery is "outside" the sleeve and the flap wraps around the battery.