I know there are kits for this but at $150 +, I know there are cheaper DIY ways of getting Water/ Alchahol injection, question is, what do I need? could I use a hydraulic brake light switch to activate the system when under boost, run a toggle switch to the brake light switch so it dosn't come on when I don't need it? what kind of resivore/ pump do I need? where to get the nozzle. do I spray before or after the turbo? it will be intercooled.