1703 will not always be instantly offered, be patient You can do it manually by using the MCT (direct upgrade) or Upgrade Assistent.
You know that you'll get the same thing in days/weeks that you can get today using Upgrade Assistand/MCT/ESD to ISO, right?
Right! Good question but I'm gonna wait because I can JK It's one of my test machines and that's part of a test.
Insider advice: If that is a test PC, install the first RS3 build You can install x86 or x64 in a second machine. In the next week, (in my case) I'm going to set up 2 PCs for get x86 and x64