Currently I have articles up on a website (site A) that is not mine (but I can remove the articles.) The article's aren't faring well (not only due to the recent Google changes) but because they really could do better if I made some tweaks myself instead of relying on the domain owner's SEO skills. So I would like to set up my own website and have just my articles on it (site B.)

In the past when I've moved content, I've set up redirects but this time I can't do that.

What would be the best way to move the articles without having to worry about them being counted as duplicate content or any other lame stuff?

Should I, A: Save the articles on my computer and remove them from Site A. Wait for Google to remove them from the index (several months.)

B: Remove the articles from Site A and immediately place them on Site B.