Ah, ammo boxes. Where would we be without them? Compact, water tight, plentiful and reasonably priced. Nature's most nearly perfect product /forums/images/graemlins/laugh.gif
I mounted one in a similar manner on the ROPS on my JD. It's on the outside, and above the fender, so I'm a little less likely to dent it with my head when working around the tractor. My hazard lights are mounted on the fenders, so I had a little more freedom in where I put it and still have it be at a convenient height.