Great post, with some great tools! Thanks for posting it. Although I'm more confused now, than I was. My first scan on InstantPosition gave me a 26 out of 40. Then I went to W3, and made some of the changes it recommended, and IP now dropped me to a 7/40.

As has been said by others, a lot of the errors and warnings from W3 are inaccurate, but machines do that, when reading English, so most of them I can disregard. In the first few minutes though, I found two serious problems, and have fixed them. So I really appreciate the links. They have been saved, and will be well used!