Fuel Pressure Regulator

Hey guys, its me again. And yes, its the Lincoln again. But this time its just a fine adjustment question. This car has a fuel pressure regulator inside the Throttle Body housing. Before i unplug the adjustment plug, does anyone know what type of tool is used to adjust this? Allen, TorquX, Phillips, Regulator, Socket....? I know some of you guys have done this before, and im just looking for some help. Thanks:)

After you remove the cap off the regulator it it has a small Allen head screw under it. Sorry i can't remember the actual size but if you have an old carb adjusting tool kit it is the same size as the one used for that. Size might poss. be 3/16.