I find this timer to be as many have said before, one of the most important items I have in the darkroom, other than electricity. I have used it to print contact prints but this is my first time using the split grade mode on it. First, after finding the soft exposure I needed I did what it said to do and that is to set the hard to the same exposure and then put it into split mode. I exposed my paper which at this point should be Gr.2 by the book. My prints first came out I feel slightly more contrasty that Gr.2 but that is okay. Second, my soft seems to advance one to two 1/4 grades more when matched to my test strip. This seem to be consistant from print to print. SO All I do is find which one I like and go down two. Adjusting for contast and exposure is so suttle and very nice. This make my printing session much easier and more perdictable.