After using D-76 exclusively for about a year and a half, I decided to try some Rodinal. I have my Mamiya m645 1000s here that I've been meaning to use before my return period with KEH expires to be certain all is in order, and I decided to develop the Arista EDU Ultra 400 in Rodinal instead of D-76. I was nervous since this was my first time with the new camera AND a new developer, but I wanted to see what was up. Those negatives are perhaps the most beautiful I've ever produced. I looked at them on my light table with an 8x loupe, and they are absolutely stunning. They're sharp, reasonably contrasty, and dense (perfect for an easy print session). Every other time I'd used EDU Ultra 400 I've gotten poor results, be it 35mm or 120. I don't know if it's the Mamiya or the Rodinal, but those negatives are wonderful. I can't wait until this weekend so I can print them.