Andy, I have been kind to you, I have fitted the pin where it is snug but will not take a tremendous amount of force to tap out the toggle axel, that is all you do, drift the pin out with the proper pin punch then change to your alternate block and tap it back in.
The three pins that are tough to drift out are the front toggle axel pin, the pin that hold the coupling link to the back toggle link, the small keeper pin that retains the middle toggle axel in place and once in a while the very very very, did I say very small pin that holds the disconnector button in the end of the sear bar. That is about the diamter of a push pin shaft, YIKERS!!!!!