whats up with single vs dual solenoid boost controllers? is it just dual can hold twice as much boost pressure? 18psi vs 36? and dual has better response. so is it really worth 200 bux more?? for me, im goin low boost, so im thinkin single should be good, right?? speakin of which what the difference between blitz's 'full auto turbo timer' and their 'dual timer'? its just bout 20 bux more