I could use several 4" aluminum lens boards for an early Calumet monorail CC400. At least one needs to have a small hole. (I would like to know the hole sizes.) Please reply by PM.
--Bob
I remember reading a post here or on LF forum - in the last few days - recommending someone who will make metal boards. Unfortunately, can't remember who it was.
Also, if truly 4" x 4", would a beseler lens board work?