Great article! I use droppers to mix my paints so the ratio works for me. You could pick any unit of measure as long as you followed the quantity in the chart.
Now this has got to be a most valuable resource! Now, how about pallid flesh, jade green, lightning blue, vile green and all those colours which GW discontinued last year? But as a starting point to get those colours, you've outdone yourself, temet.
Great tutorial, I use it in my work, the charts are ready to print.
As for the color chart, U have to remember that what color u see on screen is dependant on u'r config so i think it's more useful with names of colours.