Hi, Tom, Pavel and Joe,
I'm glad you put that option in, Pavel. However for model- building it is not so straightforward. Normally we are building into density-modified maps. Density modification works poorly when a significant set of reflections is excluded, so this becomes impractical.
AsI remember it was a paper (by Blanc, ..., Bricogne ? am I wrong?Ifailed to find it right now) where they faced exactly thisproblem.Again, as I remember they suggested to exclude the test-setreflectionsfrom the map calculation but , to minimize the mapdeformation, insteadof them include average Fobs for the correspondingresolution shell. Is it a way to answer the original question / problem ? As I understand, a similar technique Pavel already uses to calculate the maps with Fobs missed. Best regards, Sacha