I know that the default is D76 at 14 min at 22c (I'm shooting 120). I also heard of DDX at 20c for 9min stock and 14min, 1:4 dilution. But I'm interested in trying out other developers. Specifically Microdol and Perceptol. Any thoughts? Is there a rule of thumb I should use any BW developer with XP2 seeing as that its made for C41 process? Thanks in advance.