Quote Originally Posted by nsurit View Post
I have an Aristo cold light head which came with my Beseler 45V XL enlarger. The head has a D-2 marking on it which I am assuming says it is for an Omega enlarger. Has anyone used such a head on their Beseler. If so what kind of adapter is required.
Yes, indeed. It is a very light metal donut that sets into the round area after you remove the Beseler condenser unit. You then can drop in the cold light. Shouldn't be too hard to find.

You may want to consider the RH Designs cold light control unit. It would be a huge upgrade from the Metrolux. May want to also grab a backup lamp/tube while they are still available. The 45VXL is a freaking tank. You would be good to go for a looong time.