Thanks Rick! I processed a test roll of Tri-X ... 70ºF, 1:1, for 13mins. (Kodak recommends 9mins.) The images look very good, not thin, however the frame numbers are still lighter than on my old Tri-X film, processed 20 years ago. I'm thinking Kodak changed something regarding the "burn-in" of the frame numbers for some reason. Maybe they are trying to save time and money? 🙂 Why would the development time difference, 4 mins, be so great?