sorry to but in on your post mate, but i have just fitted an oil pressure gauge to my g, its a stack one and i got a t pice with mine but came in a separate box,
and hayesay i plumed mine in to the switch with the charger feed on have i done it wrong shuld it be in the other switch just next to it, there would be more room the way you say because my way the boost return is kinda in the way