Has anyone removed the "brain" from an Osprey Talon 44? On my last 3 trips, I have found that I have so much room in the pack body, that the brain ends up just being a floppy, unneeded pack section. I am pretty sure it's removable, but just wondered what people do after they remove it...it's a drawstring instead of a roll top underneath the brain, and I am worried about rain getting in the pack easily through the hole. I guess that's what pack covers are for, eh? lol