Hi! One of my sites was heavily hit by Penguin. Over 80 unique articles 1000+ words each but backlinks are from automated scrapebox, xrumer and senukex submissions with I think too much exact kw anchors. My traffic now is only 5 % from pre-Penguin traffic, from google a receive traffic from only 2-3 keyphrases. My articles are targeted to long tail phrases and I have these phrases in url, title and descriptions. Now I think about redirecting all my articles using 301 redirect to other urls, like redirecting mydomain.com/my-long-tail-keyword to mydomain.com/articles/my-long-tail-keyword I am going to set 301 redirect only for 2-3 days, I want Google to index new urls and after that I am going to remove the 301 redirect before the penguin penalty was transferred to my new urls. After that I am going to remove old urls from index through GWT link removal request. All my articles will be with zero backlinks and I think they could rank better, but there will be a lot of 404 errors. What do you think about this plan?