I am in the middle of trying to figure out filter options for my cyclone. I have figured out the original air to cloth ratio for my Grizzly GO442 as 9.60/1 from dividing 2184 cfm by 226 sq feet of filter. This is the easy part. What is a good ratio ? Google from several sources has me from 3.5/1 all the way to 10/1. At least four or five other sources talk of the importance of getting this ratio right without telling you how to get it right. I have deduced this is a moving target because of all the variables in collection. How does one proceed to figure out a suitable ratio ? I would like a better idea before talking to sales guys who will tell me they have exactly what I need.