I am very new to home processing of film. I was told by a knowledgeable guy that if you have an unknown film with no development instructions that mixing Rodinol 1:100 and leaving it in the tank for an hour will produce very good results. It will just develop until all the agents are used up. It certainly appeals to me as a "set and forget" method when speedy results aren't needed - instead of devoting attention to watching the timer and agitating on schedule, just come back an hour later and complete the process. Has anybody tried this? Would this method work with Ilford DD-X or Kodak T-max (my current chemicals)? If so, at what concentrations?