I was just thinking about that today. There is a set zScale ACE, but no zScale property for the editor, so I was thinking about adding it. I am also thinking about making the default zScale '1', since in general, I think it's better to operate with the 'regular' z-axis scale and a zScale of 1 (and zElevation using the same units as x and y. So look for a new release shortly.