As a Prescysol user I have grown to enjoy the benefits of Pyrocatechin developers. No disrespect to Peter Hogan (the man has to make a living) I thought I could save money by mixing my own pyrocat. I just developed 4 5x4 sheet films (HP5 plus) in trays and must say I am very impressed. At 24 degrees I find that 81/2 minutes gives me just over N contrast and 61/2 minutes is almost right for N contrast. This is with constant agitation and the film rated at 320 iso. I intend to try mimimal agitation in trays (one sheet at a time) for 9min 45 seconds with constant agitation for the first minute then 10 seconds every 3 minutes thereafter. I still fee I must refine my development times but my initial impressions are that this is a developer I can stick with.