Update #7
So i have been talking to radodrill about fan controllers. He showed me what he did for his Rad GT. So i have designed my own fan controller. It will only be 2 channel, unlike his insane 8 channel one. His was done on a soldering board (one with loads of pre drilled holes). I'm lucky enough to have access to PCB printing facilities at school so i will be making the PCB myself
PCB design (to scale). On the right of the big electrolytic capacitors you can see 3 pads. This is where the potentiometers will be attached. Middle-left you can see 2 pads where +12v and negative connects. At the top right of each section you can see a box with 2 pads in, this is where the fans connect.
Real-world drawing of it
The circuit design (this was NOT done by me! This was made by radodrill!)
My layout was done in PCB Wizard 3.50. Great little program!