Mike: Shame you can't find a friend with a quick connection! 
The fun starts when the download complete.
Brian
Yeah

. . . but it's a desktop PC so not quite so simple even if I could find someone. But I have been playing around with the Preview for a while, mainly to make sure I could install all the software I need. I was pleasantly surprised to find everything worked including some really old stuff.
Anyway I've now reached 50% downloaded in 14 hours. I even tried tethering my 4g mobile and bridging the connections for a while to speed things up, but I only have a 2GB monthly allowance on that so couldn't do it for long.
The extra time will allow me to finish making backups of all my data, which of course I always do regularly anyway

If all goes well I plan to create a DVD and do a clean install, replacing the multiboot Win7/XP/Linux arrangement I had, since I find myself rarely using the other systems these days.
The new Windows 10 thread was a great idea, by the way

Mike.