I want to use an 8pt/px grid system in my designs - but I come up against an issue when my artboard is not divisible by 8.

I want my columns to be able to match my grid (so everything is divisible by I can do this, but only if I align my columns to the left or the right and set a custom offset.

This leaves me with misaligned margins on either side though.

If I had the option to set the grid to center (or even set an offset) this would fix this, as the <8px grid squares would be at BOTH edges of my design. Allowing me to use 8px grids but still have everthing nice and centred.