Those couple of images look great. What I really wanted to know from this post was if a decent continuous tone could be achieved from the ortho litho film and it seems it can. What kind of developer did you use?
I think my aperture is somewhere around 280 - 300 but I'm not exactly sure. On a sunny day (but in shaded areas (to avoid too much contrast)) I was getting exposure times of 5-7 minutes.