Hi there, I was offered an Agfa Varioscope 60 enlarger with Ilford Multigrade 500H head. The head comes with a power unit and electronic 500H timer/controller. I read somewhere that there is a foot controller to the head, but this setup does not come with it. Basically I would like to know what is this 500H? I know it's multigrade head, but I can't find any practical info of it. How to use it? How is it good? Something not good with it? It seems to be a condenser head - do I have to change condensers for different lenses? Etc.. All info appreciated! Also, info on the Agfa Varioscope 60 would be helpful... It comes with three lenses and the film holder seems to be with glasses and looks like it fits 6x7. Is this setup worth anything?