Homelite 330 oil tank duckbill replacement

[dpress]

I used my 330 in anger for the first time yesterday. It started and ran well and went through a tank of gas in no time! 
On cleaning it today I noticed that the chain was rather dryer than I would like - it had used some oil, but not as much as perhaps it should have done. I will check the oiling with the bar off, but wanted to check and if necessary replace the duckbill valve for the oil tank in case that is a factor.
Has anyone got a secret method as to how you remove the small brass plug that cover the valve itself? My one is intact and stuck fast in the hole, and so far has not budged at all with my attempts to pry it out with a small screwdriver. I just wondered if there is another way to remove it?

Thanks, Steve

[Jarhead ☠]

I used an awl and tapped it out at an angle.

[dpress]

Is it best to try and tap it out from inside the oil tank or is that not possible? I am trying to ensure that I don't destroy the plug on removing, but don't mind if a good duckbill got butchered from inside.

Thanks, Steve