Error -6,727 updating A1392 Express from 7.6.4 to 7.8.1

I got a used Express and get the above error trying to update the firmware. I know it is working, as I now can go across the street and still maintain internet connection to my Airport Time Capsule in the closet. The Express is connected directly to a couple of Netgear switches that the APTC is also connected to.

Never mind. After the 13th time, it got better!