Hmm why so many Quadro's? You need 6x PWM channels to run 4 fans from each Splitty 4, with 6 Quadro's and Aquaero Lt have you'll have 28! If you intend to use the 4 PWM on the Aquaero for something else then the most you'd require is 2 Quadro's and that would still leave 2x PWM free.