Up to now I bought 4 units, but the inside of the 2 boards is recessed on the surface of the white board, it was not used, we had to exchange it. If there is inspection work etc. before sending it, you can save time and effort twice. In terms of delivery, if you can stop the business office, you can save waste of time. (I was told to tell the shipper if I told the factory by calling the delivery office every time.I would appreciate if you could write to HP if there is a reason why you can not stop the business office.