Are you sure those numbers are correct? 3mL/sq. inch of concentrate would mean 240mL of concentrate for a single 36 exp. roll. That would mean that you couldn't even develop a single roll of film in a double-roll tank with 1+9 dilution. What's more, you could only develop two rolls per 500mL bottle of concentrate.(posted 8316 days ago)My experience has shown me that 15mL of concentrate per roll is enough. But then again, I'm just scanning and I've *never* printed this stuff via analog means so perhaps the film isn't so hot when printing the old-fashioned way. However, when developing at 30mL/roll and 15mL/roll with the same concentration, I get the same results for a given emultion (at least, by looking at the negs through a 4x loupe).
Regardless, 3mL/sq. inch seems a bit much for this developer unless you define concentrate as 1+9 or 1+14 dilution.