I don't know about fitting it to the Durst but I have used the Aristo VCL for a long time and I like it but the first thing you will have to get used to is how dim the printing light is. I am using a later generation Aristo VCL head and for some reason I have to print at a high contrast setting. My normal contrast setting is between 3.2 and 4. Those issues aside it is a great head.
Thanks for replying. Is the apparent dimness of the light a problem for dodging and burning? Do you need to work in an exceptionally dark darkroom?