I am in the process of restoring a rudder twin and noticed that the bottom of the rudder is held place bya pivot pin with a brass GGG pin securing it in place. I think these are called drift pins if that’s what it is and assume that I could knock it out with a drift punch. But I don’t want to screw it up if I’m wrong. Does anyone know how to get that brass pin out? so far does not wanna budge.