This question is for Sandy but anybody else who has already prepared the formula into stock solution can reply.I would like to mix one litre of stock solution of Rollo-TEA.Somewhere else I read that you suppose mix two chemicals at higher temperature at 250 deg. let it cool down to 175 deg and then mix in the rest of the chemicals?What is initial water quantity 800ml?or less.Then you top it up to one litre of working solution. I love negatives in PMK and Pyro-HD. One solution developer makes lot of sense.(Thanks Sandy) I know I'm going to have to experiment but what is the difference in developing time to PMK or Pyro? -20%?Also how long do you expect stock solution to last? Thanks for any input I can get.