Post Process Outlining Issue

Hi Guys,

i have made a little outliner with 8 points query. This works.

After that i made an outliner with 6 points query. Those 6 points are forming a hexagon.

But this doesnt works correctly with certain outline sizes:

SIZE = 2 ; 4 ; 6 ; …

SIZE = 0,5 ; 1 ; 1,5 ; 2,5 ; …

You can see the issue when you use sizes with frac=5 or uneven values.
I would like to know, how to fix this accuratly.

Here is the project: [Dropbox - File Deleted][3]

Thanks in advance