I have been working on my Mini quite a bit lately - In the last 45 days:

New wheels and tires - lightweight 17x8 wheels and 235-40/17 UHP tires
Alta Sway Bar
FMIC

Still to go in:
3" cat delete downpipe
2.5" straight pipe exhaust
turbo that doesn't spew oil - stock bad turbo will get sent out to be rebuilt as K03/K04 hybrid. This was the plan, but my turbo has recently decided to spew lots and lots of oil.
DIY water/meth kit - this has been in process for a while, mostly because finding the right fittings are a PITA.

In looking at where to mount the injection nozzle, I came up with an idea - mount the nozzle into a plug that deletes the noisemaker. I think it should work out perfect - the pump and solenoid will be on the firewall just to the drivers side of my AEM intake - nice and short shot to the nozzle. Using factory washer bottle for fluid.

 

You need to place the meth nozzles before the map’ other wizes your ecm will not read the temp difference an not work right !

 

 

They are all technically MAP sensors !

One is a manifold sensor
The other is a boost sensor

You need the nozzle before the boost sensor ‘ just like the photo I posted’ check out aquamist install kit guide ‘

 

The sensor on the manifold measures manifold vacuum/pressure. The sensor on the intake pipe, near the fender liner, measures both boost and temperature, that's why the WMI should be before the 1st sensor --- to sense the WMI cooling and make appropriate ECU adjustments.