Changing o rings on the impact

[Jondon51]

has anyone changed the o rings on the impact. I found changing the reg screw rings very hard to do because I don't have nails to push the o ring over . Any help please 

 

[heavy-impact]

It's simple with a pick tool. You must blunt the point though to prevent scratching a sealing surface.

https://youtu.be/FOlG19kTf6Y