Help Choosing Setup

[SIVIirnoff]

I am looking into Water injection and have pretty much narrowed down what options I want/need but need some advice on a couple details and also would like suggestions as to which setup will fit my needs the best.

First of all, I have a GR chasis STi and would like a trunk mounted kit.
I want a progressive injection system to spray from #PSI to #PSI.
I want the system to have failsafes to reduce boost and timing in the event of a WI system failure.
I want a low lvl indicator light.
I would like a large tank(preferably 3+ gallons)

I would like advice on where to inject.
Whether I should have duel injectors. ie: pre-turbo and pre-throttle body

I know pre-turbo injection can damage the turbo, how can I make sure this wont occur with my setup?

If anything in my above post seems off, please feel free to suggest a better option. Thank you all in advance for your help and suggestions.