Do you usually use stock or working solutions? If mixing up working solutions to use later, do you need to worry about the water temp? It's just gonna change anyway... When mixing from a powder, is it ok to shake instead of stir? How can you tell when paper developer is exhausted? Or do you toss it each time, like you do with film dev. Same with hypo-clear. I've always been told to toss it each time, but the bag says it can be used on 150-200 8x10 films. How does that equate to rolls of film? I'd rather not toss it each time if not necessary. None chemical - if testing your darkroom for light leaks using the coin trick thing, do you have the safelight on, since that is how you will normally be printing anyway, or do you test out the total darkness? Also, anyone have a good site that explains how to align the enlarger? I am almost ready to set it up, so I will need to get it aligned and have no idea how to go about that. Thanks!!