Ill be developing my first black and white film this weekend. Its Kodak Tri-X 400 that I shot using my Olympus XA2. One problem (maybe): I had the camera set to 800, so Ive underexposed by one stop. It wasnt my intention to complicate things for this, my first film developing experience, but hopefully its not too big a deal; I think pushing means just adjusting the development time. Problem is, Ive see references that say do nothing different if its only one stop, and others that say to multiply the development time by 1.5. Can someone help? My developer is Kodak D76 that I mixed up earlier this week. How should I adjust the development time? Also, should I use it stock or diluted? My other chemicals are Kodak Indicator Stop and Ilford Rapid Fixer. Thank you.