Picked one up yesterday, it has 4 internal layers of foam, 2 being pluck foam and the other 2 corrugated, hinge pins are metal and I stood on the case to test its rigidity with no ill effects.The lid has an O ring seal and as John says is dustproof and waterproof, my only dislike is that the clips that hold the lid closed are a little hard to open but hopefully should loosen up with use. The final size is 430x380x154 external.
