Looks great. I was thinking that you might want the factory insulation on the fuel tank. Rubber is a better material to prevent any vibration and prevent anything static near fuel. Don't know if I'm right though?
X2 the foam will not last there very long, use roof felt, the same stuff that is under the shingles of your house, or buy the repo stuff.
As for the vent, I am not 100% what I would do in your situation, I just left the original line hooked up to the front of the car, but it is not connected to anything.