Nitrous plumbing A1A...??..

I called the zex techline and basically out of all the questions that I asked he was only able to confirm that there is no positive or negative to the solenoid...
It was very apparent that they have no working knowledge of nitrous except for helping people read the instructions for their kits... Could not talk about jet sizes whatsoever but only quote the part number of the kit and it's part number for it's Jets.. didn't know the screw size that goes in the bottom of their solenoid... I said I'll probably have to take it to the hardware store and figure out which ones fit and he agreed... again it was quite obvious this tech line is completely for people who can't read their instructions for their kits... Pretty much worthless...