The other way around Lee, it is Melody Bostick and Richard Sullivan.
Although using ortho film to produce continous tone enlarge negatives is not that hard, I am totally ignorant about the use of half tone screens etc. But I have seen the cameras that do this and it seems like a good idea, of course the screen would have to have a very small dot pattern for the negatives to be useful to alt printers.

Jill, what would be your prices for enlargement and what kind of paper would you use?