Tuning Diana 54

This is my first air rifle. Finally shot it outside and the accuracy is great, but I want to adjust the trigger to function as a single stage so it will mimic all of my other rifles. I have found info for the TO6 trigger, which has two slotted screws. Upon trying to adjust these, the screws are extremely tight as if they have been secured with LocTite. Being naturally heavy handed, I don't want to force these and strip threads or break a screw. So is this normal and I just need to put to torque to them, or something else?



DUH.... ONE DROP OF PENETRATING FLUID DID THE TRICK