The trigger (roll) pin of my CZ75B would shoot loose after about 50 rounds and so I'm thinking of putting in a new one. Is it a matter of pushing it out left to right and putting a new one in right to left? Is there anything else I should look out for (other than ensuring that it is unloaded etc) I don't think the pin is tapered so it doesn't matter which way it goes in first, can someone confirm this?