Can someone identify this factory Sako trigger and explain the different trigger adjustment screws. * I understand the largest set screw is for weight of pull, but the other two are what ? * Sear engagement and over travel ? * Which ones are which along with in what clock wise or counter clock wise direction are they turned to do what ? This trigger is in a recently acquired Sako L461 Vixen single shot bolt action pistol built in 1992 by Accuflite Arms.