Tafted Panel with Kangaroo Problem

Hi All ! Trying to made tafted panel in kangaroo . stops at the moment with seam line simulation . This stitch has different stiffness index than other mesh panel. I tried to simulate it with second kangaroo definition but it  not coincident with mesh lines. Ideal solution with different  stiffness (lower than main mesh ) and separate lines in the end, for future seam-pipe creation. have somebody an idea or recommendation how to do it .