Do you really think the captain of a UPS flight from china to anchorage flies around turbulence, in a effort to find some nice smooth air for all the boxes in the back of the plane? I imagine he just plows through it. It's not that bumpy up front.
Bitmaintech should either find a way to secure the cards SECURELY, without putting any stress on the PCI slots (pc case manufactures figured this out decades ago - they screw the boards to the case, not the motherboard), OR, ship miners with boards not installed.
You should be able to put an S2 in a paint shaker at your local hardware store and not cause any damage. You can with any other pc or server (ok, only if you remove the hard drive first...).
My S2 received yesterday has a metal plate completely covering and holding in the boards. Arrived in perfect condition.
Anyone else notice that the power supplies are used? The Enermax labels are peeiing as if from age and heat. Still they work fine.