Hi there, I've been working on setting my own darkroom at home with my LPLc7700. I've been working with this model for some time somewhere else, where it was all set. Now I wanted to make my first print and to my frustration, discovered that I cannot focus the film at all. Only when the enlarger head is completely down i get a sharp image just slightly bigger than the actual negative. When I pull the head up and the extendable part completely folded the image starts again to get sharper but never completely focused. Is there any kind of calibration to be done before starting? Can anyone give me a hand here please? Thank you!