I am restoring an Omega D2, having recently acquired the parts to fix it. It has the original condenser head and I also have an Aristo cold light source for it. I was wondering how useful it would be for printing with variable contrast black and white papers, or even RA4 color papers. The big issue is how to handle filtration. Would using gel filters under the lens significantly impair image quality? I can't think of another way of putting the enlarger to such use, absent finding a mega-jumbo set of the appropriate filters to go above the condenser.