Top/Bottom pattern question

[mkoic 2]

Is there a way to have the top surface and the bottom surface have the concentric pattern while the rest of the layers of the top and bottom use the line pattern?  What I'm thinking is that in some cases it would be nice to have the strength of the 90 deg alternating line pattern for most of the top and bottom, but for cosmetic reasons have the concentric pattern on the outermost skin layers.

 

So far, playing with the settings I've only been able to have the following combinations.

 

1)  All bottom and top layers lines.

2)  All bottom and top layers concentric.

3)  First bottom layer concentric, remaining bottom layers lines, top layers all lines.

 

I have not been able to create first bottom layer concentric, remaining bottom layers lines, all but the final top layers lines, final top layer concentric.

 

Also, what does the Top Surface Skin Layers setting do?  I haven't seen it impact anything in the preview.

[mkoic 2]

Ttt 

 

[burtoogle 515]

Set top surface skin layers to 1 (or more) and then the experimental setting top surface skin pattern becomes visible and you can set a different pattern for the very topmost skin(s).