I exactly have problems with edge sharpness. Well, not exactly edge, but: if you look at print in portrait format, for examlpe from bottom to top, about 5/6th of print is sharp(bottom), and 1/6th(or close to that) on top, is unsharp(or vice versa . That is why I asked about how to performe alingment checking. So, Ole, you said in fact to take condensors out of enlarger when use colour head? I do use mostly colour head as I work with Ilfors Multigrade papers...

Never think of that... Thank you very much.