I want to use ZM in densitometer mode to refine my development times. I have just one question before I begin. When metering with ZM, I guess it doesn't make any difference if I'm using condenser or diffusion enlarger. So, what value should I want for zone 8? Logic tells me that it should be 1.2 to 1.25 (values for condenser enlargers), because additional contrast for diffusion light sources is needed to compensate for flare (and I'm metering after the flare did it's work). Am I right?
And if anyone is using ZM this way, how does it work for you? Any problems I should know about? Any tips?