I've been using my Durst Laborator 1200 with CLS 500 head for a few weeks now. So I have a few questions. When I change magenta, yellow or cyan, how much must I change the exposure time to get the same exposure as without filter? For example if I add 10 magenta. When I add density filter, how much must I change exposure? For example if I add 10 density. When composing the picture on the easel, what is the normal procedure? Adjust height, turning the handle next to the focusing arm and at last adjusting the focus? All the numbers on the column, what do you use them for? taking notes on which height you use for a spesific print size with a spesific lens and negative size? Or can I find this info somwhere so I don't need to take notes? So far the prints look OK after a lot of testprints, but knowing more about my questions will improve my workflow and results a lot.