How to create an 45° Quantize position? — Making an isometric grid

Hi there,

Basically I have a grid of circles animated via noise. I want them to animate in grid with grid lines at 45° angles.

I have the transform set to a 45° (see screen grab) However I can’t work out how to get the quantize position in the limit chop to also be at 45° angle.

Any help much appreciated!!!