1. I have a category NOT forum that i want to change, would this effect my SEO? It doesnt seem like it since all the threads just show up as DOMAIN.COM/THREAD.HERE and not like DOMAIN.COM/FORUM.NAME/THREADNAMEHERE plz lemme know as i need to change a really old category but kinda nervous if it will change !? 2. Id like to add some sub categories and move like 3,000+ threads, will this affect a lot of SEO!?