anyone with AIS injection

I want to set the system to activate at around 5psi. It comes factory set to activate at 10psi (I'm not planning to even run that much
) and the rep told me to turn it clockwise approx. 1 1/2 turns should put me around 5psi
I'd like to try and get a little closer from some tips from someone that has made some adjustments. I tried to find a "pressure" pump (not vacuum pump) that I could borrow/rent from an auto parts store, so I could be more accurate, but couldn't find anything
Anyone made adjustments to theirs that can give me info?





