RE: OS FSa-110 question
I learned to use the hardened dry wall or deck screws to get the stubborn ones out. Even then you have to grip the screw with pliers and leverage the pin out.
That is one of the best feelings . . . . when you finally get the aggravating old wrist pin out and you can get on with the rest of the engine repair.
Some of you refer to this as the gudgeon pin