hey everyone again, I have the have an Omega Chromega B Dichroic enlarger and I am printing black and white prints on it. Just curious as to anyones experiences with contrast filter settings. I am printing on Ilford MGIV RC DeluxeFrom looking at the Ilford Contrast Control Fact sheet: http://www.ilfordphoto.com/Webfiles/2006130201152306.pdf I am a bit unsure of what values to use. I see that Omega enlargers are listed under the Kodak as the type of filtration. However, should I use the values for magenta and/or yellow under the "single colour filter settings" or the "dual colour filter settings". As it states, the dual colour filter settings should need less adjustment to exposure times when changing contrast. What are others experiences? Does dialing in magenta and yellow seriously affect exposure times? Should I use the single or dual filter settings? Thanks in advance, the advice on here is great!