c-attack Thanks for that super informative post. That's great information. I have a couple of more questions. I have made a new profile and am playing around with that and have managed to do a custom curve (is that the correct terminology) for the three radiator fans and that's working great. But it appears the pump only has the four options, (zero, balanced, quiet, and extreme.) and I am unable to do a custom curve for that.Is that correct. ???