Fuel pressure...

[Goodman]

I wanted to change my fuel pressure regulator but i got to release the fuel pressure first , now i know were the "valve" pressure is but do i really need to use a pressure gauge to release it?

Can i just use a flat screw driver & release it that way (like you would do to get air out of a tire)?

I know ill splash so gas a little this way but can i do this or the pressure is to great for that?

Would suck having to buy a fuel pressure gauge for one time use only unless it's real cheap to buy , like ~$20?

Thx!