Hello - I recently purchased a firing pin return spring for a 4th Model Lemon Squeezer.

I have the side plate removed and also the top round tipped pin from the frame - using a cut tipped punch that I learned about on this site. Do I need to place a punch against the hammer-side of the firing pin and drive it and the bushing out of the frame? Will this break the firing fin?

Thanks for any advise -