Update report: until today I have received ZERO mails from the EU division. Remarkable, to say the least. US division is answering my mails.
I have managed to get hold of a HP laptop with windows 11. Formatted 3 disks, of 1GB, 8GB and 16GB and loaded the firmware on those. Not recognised by Flux.
I suspect there is something wrong with my flux. And if it turns out there isn’t, the firmware update process needs some serious checking.