I've never worried about the "ideal" CG point for the blades, just getting them to balance like Charlie shows, and having the CG of both in the same spot. I currently fly a Helimax MX400 and all I had to do to get them perfectly balanced was to add a drop of superglue at the tip of one of them. When cured, it brought the CG and weight to a perfect balance.
What it is called when you balance for CG and weight is dynamic balancing. When you just balance for weight, it's a static balance, which can cause some vibrations in the head, which will make the heli not fly as well.