So the next thing to do was to hide the seam from the sanding papers.  I threw a bead of elmers glue down the beast and to up the cool factor I made a little branch, and two pot hole repairs.  I saw in some of my research photos, tracks that had this type of up keep.  I also decided the grass was still going to need something to break up the flatness, so I cut and glued some regular white paper to that area.  I made sure to put some white glue along the edge of the paper to soften the transition.

I then glued the border tiles down and made sure to over lap the sand paper. 

I painted the dry seam and pot holes with flat black.  I painted the area where the grass was going just in case you might be able to see through.  I tried two different colors just to see if it made a difference.