Huh.
That is interesting. I must have had 15-20 attempts at recovery without being able to detect the device, before it suddenly clicked when my movements became 'automated' enough. I then had a a few successful detections, but unsuccessful recovery ...
For anyone finding this document and is stuck nonetheless, I found there to be a timing component involved.
When the phone boots to the S.O.S. recovery screen, it will ask for a DHCP address. It is important that the recovery utility in the firmware ...