I have a disrovery I added the O rings an got 20 or so shots from 2000psi down to 1800psi I think total shots count is about 45 or so.think I placed 2 O rings the third one made it not in inguage the valve pin.also with 2 rings I can still increase hammer spring tension.hope this helps
Just a few crows I took while deer hunting yesterday morning,it was a slow morning.shot 5 only recovered 3.top picture is for yesterday and the bottom is form a week ago.