Shesh, one of the nice things about Pyrocat is how little of the actual stock solution is used as working solution. For example, when I develop 1 sheet of 8x10 I use only 12ml of stock Pyrocat HD (i.e. 12ml:12ml:1440ml - this covers the negative quite nicely indeed). If you are going to try minimal, stand or semi-stand agitation with your negatives measuring 3x4 then even less is required. I would not use 1:1:100 for minimal agitation - try 1:1:120 or 1:1:150.