Very interesting!,
I modified old russian enlarger with the parts from original Minox enlarge: lens+film plate. I red that Zapp used curve film plate both in cameras & enlarger, to minimise spheric aberration.
I don't think yet about light source... I have not a lot of time for my hobbies
But I am not satisfied with scaning, not due to quality, just I think the analog process have to be analog to the end...
I hope I'll finish my preparations for printing
anyway I have already my dark room!