It seems as if it should be so easy but never seems to go that way for me. I have two YJ valve core service tools. Whenever I try to remove the cores (under pressure) for recovery, etc. they seldom actually come out. I ensure I'm on the core before tightening my tool. Then I back the core out and continue several turns after I feel the pressure pushing it out. After closing the valve and removing the core tool.... usually its loose but doesn't come out. I'll try to use the pressure to blow it out which only works sometimes. Am I doing something wrong? These seems like it should be pretty straight forward but isn't so for me. Am I missing something? Thanks in advance.