Jeeepers that's a heck load of cash.
Just one thing, if you're squirting into the air intake the solenoids will work better if they are close as poss to the air intake, i.e. Battery side. After my recent visit to WON they said the location I have my solenoids (same location as you) is perfect for keeping cool and access requirements, but being closer to the inlet means a shorter distance between solenoid and inlet, creating a better hit. I've no plans to move mine as I can't be bothered with the hassle, but maybe something worth considering?
Keep up this amazing thread the mind boggles how this beast will drive