Left and right front box supports:
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Tool kit tucks in one corner:

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Duffle bag with 2 days clothes, room for camera or who knows what else:
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Throw in more stuff until the lower snaps are too tight:
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Upper snaps to the rescue:
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The rear hatch will drain water on this cover but contents expect to stay dry. A small cooler could even keep picnic goodies fresh on a hot day in there...