Hopefully this is in the right forum location. I am having trouble getting the last bit of surface quality dialed in. First, I know I can line seams up at a given location etc, but I'd prefer to solve this little visual artifact.
All of my print settings are included in the album as well as the pictures of the model and problem: http://imgur.com/a/7ldfu
Essentially, what is happening appears to be related to travels from the inner to outer perimeter (and based on prints after this album, occurs on outer to inner as well).
This occurs when I have print outer to inner, or inner to outer. It happens with only retract over open spaces, it doesnt seem to change when I doubled coasting, or nearly doubled my negative extra restart distance. The screenshots are of a version with retractions on inner perimeters, but even on versions without inner perimeters, this occurs.
I haven't used Cura on this newly modified setup, but I do not see similar issues on old models, at least not that bad. My next step tonight is to duplicate my S3D settings in Cura and Slic3r and see how they handle these transitions.