Robbie, I started out using Ralph Lambrecht's chart for the IM-10, but since I split print (blue/green) I had to adapt it. I found the easiest way was to set the meter that equates to a known time and adjust the aperture with the green filter in place until the meter zeros, then take a second reading for the blue with the green filter still in place to get the time for the blue exposure. If you use regular filters, the chart works well in my experience. When I get more info accumulated about the method I use I will probably pass it on.
Anyway, I use the Neonon since I can de-click the aperture ring which makes the process easier of course. If you want to do something similar, Componon-S and Minoltas also de-click if you already have one.