I have not used, nor could I find one to see.
FWIW. A 2500cu in pack should NOT weigh 9 pounds! For that size (day pack) check out the X2. For more hauling, the Blue Widow.
Personally, I have the X2, I like the smaller size for getting around, yet it holds all you need. Then it can make the initial load out. once first load is out, I go back with a dedicated freight hauler. Last years elk was done in two trips.
Hope this helps-