I have inherited a Leitz focomat 1c enlarger, no lens, Alford 500hlz head, controller and foot switch. I have a wonderful 1c that I use, but I am not sure what to do with this thing. Any thoughts on these heads. Everything works great on it and I can see the change in light when I change the filters from 0-5. The 1c is the great model with the long column and work well too..