bah - nothing is fooking straightforward is it

went to connect it all up at lunchtime; simples plugged in the t piece, connected it up and went for a spin; saw a MAX of 5PSI

Urm, no thats not right.......
So had a look around; couldn't see anything obvious - nothing trapped etc....so tried the t piece a different way and lo and behold it works! except it now buzzes again..........
After speaking with Mr Dave I believe I somehow need to connect one end back into the system much like you petrol lads do.....any suggestions?

Here is how its currently fitted:

It was originally fitted to the bottom piece but that doesn't show hardly any boost

And here's how I modded the vent and what it looks like in the daytime


