Ai ai ai, I've developed in Acufine and Rodinal in the past with no problems. Now that I'm trying XTOL I've had three rolls with bubbles along the edge. This last roll I definitely had the tank full, 500ml in a Jobo 1520, but the last two frames which were on the outer edge of the reel have bubbles along the edges (the tape end of a 120 roll is the beginning, right?). These are fairly new, clean Jobo plastic reels, 1520 tank, 120 film, I agitate moderately for the first 30 seconds, then 4 inversions every 30 seconds after that, tapping the tank on the counter, and this last roll was TriX shot at 320, 68º F, 8:30 min. When I took the cap off to pour out the developer I could see the bubbles. I've never bothered checking for bubbles at the top of the developer before because I haven't had this problem, so I don't know if XTOL is more prone to bubbling during agitation than Acufine or Rodinal? Any tips for mitigating this? Also, a question I posted in another thread that no one has had a chance to respond to it: "I've been looking for a summary of what happens when: you dilute developer push film raise the developing temps lengthen the time agititate more/less as far as grain, contrast, accutance, density, etc., go. Does anyone have a nice page that summarizes these variables? Thanks."