Dang, that description
is comprehensive!
Okay, according to
this site, the edge should be turned up. I haven't held a saber lately, but my guess is that it's easier to pronate your wrist (rotate it away from you) to get the edge facing up.
Also, I just found the Army instructions on the West Point site -- it's a PDF file. Click (or right-click and save-as)
here.
Hope that helps.
__________________
Then I heard the voice of the Lord saying, "Whom shall I send? And who will go for us?" And I said, "Here am I. Send me!"
-- Isaiah 6:8