Which analyzer are you using and how often do you recalibrate it? With mine if I wanted to really match things I'd recalibrate after a certain number of prints. Say 10? Or at the very least at the beginning of each new session. That way any aging in the chemicals is adjusted for. With mine recalibrating is very simple. Just stick a grey negative in the enlarger and make a print. The analyzer then reads the dry print [actually a test strip] and adjusts itself. That's with my Colorstar 3000 but I think all the newer models do the same.