Grid every 600 on surface

Grasshopper
1

Hey guys I am trying to make a grid of lines on top of surfaces every 600mm I am getting a bit of weird results. Not sure what I am doing wrong.Grid 600.gh (10.8 KB)

image
image1268×606 136 KB

Regards,

Jonas Blazinskas

2

Oooops had to graft the surfaces…