Does that not restrict movement strictly to the xy plane? Even with custom grids at all time wont either the x, y or z coordinate need to be zero? I want to be able to move an object anywhere and it always respects the 10cm increment.
Sounds like that's getting in your way to create good art. Being off by .000003 is not going to show. Also, if you're using the quad views you're not just restricted to the xz grid, you'll have xy and zy as well. You should also be able to set a custom grid per viewport. It sounds like you're trapping yourself with this…