I've written here recently of my odyssey trying to find C-41 chemistry that someone would actually ship to me (US), preferably Kodak Flexicolor, for use in a Jobo ATL-1500. Well, I got some from Adorama, but I'm having trouble figuring out what to do with it. I've downloaded and read the relevant Kodak publications, but no joy--or else I'm just overlooking it. The bleach and fixer are straightforward, so no trouble there. The developer is the problem. I have purchased the 5-gal size Flexicolor developer replenisher (cat 191 9042) and the Flexicolor developer starter (cat 195 3009). (My preference would have been the 1 gal size of ready-to-go single-use C41 developer but it's apparently discontinued.) The replenisher looks straightforward: add the chems in sequence to 4 gal water then top up to 5 gal final replenisher solution. Easy enough. I have not yet figured out if it is possible to mix the stuff up a gallon at a time, or if I will have to mix up the entire batch at once. If so, one of those floating-lid containers will be the most practical way to store it I presume. (I bought the larger size solution because it is only a bit more expensive than the smaller sizes, and because I thought larger quantities would be easier to measure.) Then of course I have to combine starter and replenisher to make the final working solution. Do I have this right: 126 mL (or 477 mL) water; then 14 mL starter (or 53 mL) straight from the bottle; then 860 mL replenisher solution (or 3.26 L); then top off to 1 Liter solution (or 1 Gal solution). I'm wondering how I'm going to mix quite that precisely! Separately, do the starter and replenisher (after mixing from the components) solutions have any sort of decent shelf life, or should I just mix up a bunch of developer working solution, put it into the floating-lid container, and be done with it? Thanks for any suggestions.