Try and get some super-size bubble wrap - with blisters about an inch across. I got a monitor more or less suspended in the stuff in a huge box and it was ace. Don't leave it on the floor though or you get surprise "blister mines" when you walk about in socks.
Or a combo, entirely wrap and seal the A3000 in super bubble wrap. Fill 5 inches of bottom of box with peanuts, lay in A3000, fill sides and top with peanuts? For safest transport you want the items to be packed in so they can't move around, so REALLY the best solution would be super bubble wrap and buy/find a box with less leeway.
