I've asked this question before, but this one is mainly towards PMK users. I'm going to give PMK a try with FP4 and Tri-x 320. I'm currently using tanks and hangers. In Hutchings book he states that tanks and hangers don't work well with Pyro developers. The Jobo tanks look nice, but do you have to constantly roll them? And also, how do you insert and take out film that is needed for a different development times? It's easy to add film during the process with tray processing and when using tanks. Anyone use the JOBO tanks as inverted tanks? Don't you get better edge effects? Thanks for any suggestions to a newbie at Pyro!