So, if I am reading this right, for each Green Steel Blank we want to try playing with, it means re-running the 5 Vale Quests to get the 5 items to combine into the signet stone?

That's actually pretty cool, as it will give a good reason to re-run those quests for those who are already flagged.... more blanks to play with in the Raid. I guess the other question is if I go into the Raid with 2 or more Green Steel blanks, can I upgrade both, or is it one-use-per-character?

Guess that is something else for us to find out.