I wouldn't recommend Rodinal with Delta 400. I didn't like the look, and grain was big. If you're looking for a reliable developer, use HC-110. I use it all the time, and it's consistent and easy to control. If you're OK with powders, there's always good old D76 or Ilford ID-11. These are reliable as hell and it's easy to get consistent controllable results with all three developers I've mentioned.(posted 8340 days ago)