Assistance with lining up UVs in Maya (using default UV tools + NSUV)

I'm making a camera and for the case I'm trying to create a leather material in ZBrush using NoiseMaker, however to do so (as far as I understand it) I need perfectly lined up UVs in Maya... but I don't know how to do that.

Here are my UVs, and here is the checkerboard pattern in Maya. I need the checkerboard to continually flow around the edge, otherwise when I apply the leather material in ZBbrush I get this tearing on the edges.

There may be something else I am missing, but after looking online I think this may be my issue.