Ok, I need some ideas to split up and organize a handlebar box that I have strapped to the back of the seat. Interior size is 9" wide, 6" deep, 6" front to back. I am going to carry a spare inner tube, various small plastic bags with tools in them all the time and when I ride I will have my cell phone, house keys and wallet. The zip nylon top has a worthless netting on the inside and cannot be closed with everything sliding right out. Any clever solutions of dividing this space would be highly appreciated.