Had a website since 1997, and currently rank #1 for main keyword/domain-name, and #3-#5 on a few other keywords and pages. We are re-designing the website, and changing all the links, pages, keywords, everything. The website has no SEO whatsoever, other than a few keywords in the title tags, etc, small things. These keywords are highly competitive, our main keyword not so much... but as well, I still wonder how we are ranked so high.. There's really no many back-links at all. However I suppose the age has something to do with it, and it's listed in Google Places, directories, and is a business site.. I'm pretty much using the same keywords, but changing all the links, and pages, and adding a ton more keywords and changing the title descriptions. We have little unique content, if I add tons of new content, a new design/code and implement new SEO will the page vanish from Google and other search engines during the process of uploading the new site? Cliffs: Building new site, removing old one, changing seo, will site vanish from search engines because it's all new?.. How can I prevent that if it occurs.