I just looked at the 2/16 tmax 400 data sheet and it does show the 1:7 and 1:9 dilutions. Oddly the data sheet from about the same time for tmax developer shows different development times for tmax 400 film. They are close but not the same. I must admit that Kodak, or it successors, are not as careful as they should be, particularly given how picky their target customer is. Not updating the data sheet when you change the formula is not acceptable. A few years ago, they produced 120 roll film where the paper backing bled onto the film and the negatives showed "Kodak" and the negative number on them. I had a pictures of a trip I took made unusable. They also produced a batch of Dektol that out of the box mixed up as dark brown. They said it was still good but did not pull the product off the shelves and continued to ship it. Conversely, I had a problem with Iford paper and they could not have been better. I found some odd problem in the paper emulsion, I contacted them and sent them a sample print. They researched the problem, noted the defect and sent me a new box of paper. Great customer service. When I had the problem with Kodak they were quite difficult to deal with. All that said, I am looking forward to using the PF developer and am confident it will be fine.