hi dave

you can add dk 50 to your list
when i was doing all the lab-work &C for a portrait photographer in providence,
she would use dk 50 for "X" sheets of film ( always doing replenishment ) ... when it was time to mix new chemistry, i would be instructed "never to clean the sides of the tank" and to " leave about 1/3 of the tank" to mellow out the developer. when i asked her what the deal was, she said that if she didn't mix spent and new developer together, the contrast would be too much.