I use Diafine as my primary developer, except for 120 Tech Pan. With Diafine, the use of a rotary processer is unnecessary since precise agitation, temperature and time control is not needed. As you mention, 2 bath developers are very easy and fool proof to use. I never have a development failure any more, all I have to do is to be sure I get the exposure right. The results are quite beautiful.(posted 8349 days ago)