Procedural Stitches in substance painter based on input graphics

Dear people of greater knowledge

I am fairly new to the substance painter world. I would like to create an auto stitching/quilting material that is based on an input line graphic. Specifically I would like to create stitches exactly ON the input graphics. Is there a way to achieve this with substance painter? So far I have been unsuccessful.

Here is what I tried:

First I created an input layer with some black paint strokes in it and put an anchor point at this layer. (this will be replaced by some imported alpha texture from Photoshop or Illustrator later on)

Secondly I applied the “auto stitcher” tool in a different layer and referenced that anchor point to it. But it didn’t worked as expected. (see reference picture) It creates the stitches around the input graphics and not ON the black strokes of the graphics.

What seems to happen is that this auto-stitcher tool apparently pics up the border between the black and white rather than the actual black line from the input alpha.  

Like that, one will always end up with stitches on an offset to the input line graphics.

Ps: I am aware that there is substance designer to create own procedural materials that would probably be able to what I want but I don’t know a thing about that program.

Hopefully any can point me to the right direction how to do this in Painter.