Are there drain holes in the bottom of the box? I'd be inclined to have a cover for it both to keep the weather out and to keep the chains from bouncing out on rough ground. This is a great idea and one I may well copy.
I have a wooden chainsaw scabbard on my carryall box, but I haven't yet figured a good way to mount one on my DK45S cab tractor when I don't have the carryall hooked up. I've looked at the brush guard and the FEL arms and saw a posting from someone who had fabricated a chainsaw carry tray that mounted over the hood, but I'm still hoping to see something that works well, but doesn't interfere as much with forward visibility.
BOB