Fuel Pressure Regulator advice!!!!

I have a 2003 EP3 with a OEM fuel rail and I have taken it off and removed the fuel regulator due to cleaning my engine and powder coating my rail. I was putting it back together and the black vent cap had come off and the tiny screw with the O-ring just fell out of the regulator. Does anyone know how many turns it should be to put it back to factory spec? Is it ruined? I have the service manual and it doesn't really describe what needs to be done to adjust or tell how to put the screw back to spec. Car ran perfect prior. I have seen that all Honda's should run 43psi at idle and not sure how true this is. I have attached a pictured of my rail when it was finished. The cap has since been turned to be facing correctly. Please help if you have any info!

Attachment 7214