So I thought about getting the Banderlog valve...
However, someone clued me into an idea that would be way cheaper to do. Out of curiosity, has anyone thought of getting an MSD RPM Activated switch and a solenoid valve? The RPM switch would run about $70, while the solenoid valve would run another $50-$60. For a total of $130-$140, you could have the ultimate in header water control.
Install a 2000 RPM pill into the RPM switch and you're good to go!
I'd like to hear everyones' opinions on this alternative.