Thanks for the reply. The data from Reeves referenced in that post has been taken off the web, and that link in my post is dead. Reeves is no longer using film, and the test data from his page is about 10+ years old. The post of mine that you drew from is now almost 5 years old. So some of the films are likely to have changed a bit. TMY has been reformulated, although the few who have mentioned it say reciprocity is similar to the older version.