Adjuster knob as in adjust how stiff/light the steering is i assume? Think i may look into doing it just depends on how much hassle it is moving the fuesbox, are you going to be running part of a standard dash or completly custom?
The ecu is in the motor as one unit so there wont be anything else you need. Ive changed quite a few on corsas, common problem with them is the steering goes light one way/heavy the other