That's the only feature I don't like about the ammunition box. When the LiPo's ignite, you may have a small bomb on your hands... [&:] If one pack was to ignite, all others would more than likely ignite.

The toolbox will contain the packs but will also allow it to vent the gasses out. One could argue that starving the fire of oxygen would put it out in the case of a tight seal.

In any case, a steel enclosure is the way to go.

BTW, I can store 6 10S packs in one toolbox.

Cheers,
Jason.