Clearly you have serious issues to resolve, as a 2” error is pretty extreme. I am not sure how helpful the following topic will be for you, but it is full of helpful tips that did help me got to round circles…
One action that really helped me was to follow @Jayster’s experience and manually construct the sled… his process insures that the router spindle is very close to centered, which is critical to accuracy and precision…
And a real understanding of accuracy and precision with the Maslow was also important to me… I highly recommend careful study of the following…
Spend some serious time with this article… I promise you it will be most helpful.