Thanks for all the suggestions. I am using a new and correct bulb. This is obviously a problem with small enlargements so maybe all I have to do is stop the lens down more. I don't like to stop down more than about 2 stops, hoping for best possible quality, but I'll try it and see how things look, hopefully Leitz will live up to their reputation. I will also try gels on top of the negative carrier, it looks to be a tight fit, but they just might work. I like Sensei's advice, he's very wise. Pay more attention.....

Richard Wasserman