Hi, I am new on this forum, and have some questions about my enlarger. I have old Meopta Opemus5(6x6) enlarger. I have both b/w and colur herad for it. Enlarger do have condensors, but non changeable. So, it make 35mm enlargments like cropping off negative 6x6 size... I have Anaret 50mm f4.5 and Anaret 80mm f4.5 lenses. Now, I am not happy with 50mm lens. Yes it is cheap toy, with only four aperture blades. I am thinking to replace both lenses with respective Rodenstock Rodagon or Schneider Componon-S. My questions are: How to chect alingment of my enlarger(without test negative), recommendations for other enlarger(up to 6x7cm) and if anyone has good experience with Opemus5 enlarger any advice will be werry welcome.