>"I'll change the original 301s to the newest URLs, and then add a new set for the updated "numeric" pages." Do this: change the original 301s to the newest URLs (in your htaccess) Dont do this: then add a new set for the updated "numeric" pages. Instead, do this: set 301 and Location: header dynamically in your php See why: http://mohanarun.com/301-redirect-chains-best-practice-guide/ - Mohan Blog: http://www.mohanarun.com Tweets: http://twitter.com/437341