These images show the many stages of the knotwork drawing process.
Grid -> Rough Sketch -> Refined Sketch -> Finished Outline

This is the finished outline, next I will be creating a black backdrop to the knotwork and finally paint the lines. 

full view

detail view

Here's the image with the black filled in.  It's a large (high quality) image so it will load slow.

full view

I am in the final stage of this scroll, the painting.  Here's a teaser of the painted scroll.