Better grid; disable snap to locked layer?

Hi all, 

In using CorelDRAW (X6) I've wanted a better grid,  with distinguishable major and minor lines, such as distinguishable inch, half-inch and eighth-inch lines (progressively dimmer), like sophisticated graph paper.  So I thought I'd just draw my own grid, which I did and it looks good.

However, I now can't find any combination of settings which allows me to have "Snap to Objects" turned on, but disable snapping to every &^%$# intersection of my lovely grid.

I expected to be able to have my grid on some other combo of layer, master, locked, grouped etc that would keep it in view but disable snapping to it.

I even tried creating it in other software (Visio, FWIW) and importing it as SVG in the hopes that this would avoid the snapping, but no luck.  I suspect I could use a bitmap, but I'd rather have the grid be vector based so it will render nicely at different zooms.

Any suggestions how to hide my grid from snap?  (Or any other clever suggestions for improved grid, short of sticking a large acetate transparency on the screen?)

Thanks!

-- Graham