Working on setting up the colorstar 3000. This is a 8-channel device and it is complete with all the test negatives. Since it has 8 channels, I just wonder how I should set up the channels. Should I set up some channels for different papers, or I should use the master channel whenever I switch paper? I use mainly 3 types of Fuji color papers. One of them behaves totally different from the other two with the fact that the exposure time is at least 5 times longer.