I think Mike has a point. Was anything made in 1930 built to a 2-micron tolerance?
And OTOH, there's no such thing as "too clean" unless it causes other problems. If you have a vacuum/pressure line on the fuel system, and the 2-micron filters are not obstructing fuel flow, by all means keep them. If they are causing a blockage, go up to 5 or even 10, see what works for you.
"No grit" certainly is the best way to pamper any engine
, but there are practical limits to how many filters you can cascade, and how often you'd have to change them in order to prevent blockages.
Either way, there should be a guage in your fuel lines, so you can tell "for sure" when then filters are getting blocked and the flow reduced.