I was on the market to drive the pumps I have externally. I was planning to buy a cheap 12V controller, a variable resistance, and be done with it. Then I saw this 5.25″ external box which was only few euros more than a simple 12V power supply. Also one of the “other things people got interested” part tempted me to buy a fan controller (Scythe KM08-BK Kaze Master Flat II) which turned out to be great! At the moment, I have only two of the 4 controllers working, since I need it on Friday. Here are some pictures in the meantime.