I had the tip of the key break off in the ignition stitch. I can sill use the broken part to start the engine. I’m lucky to have the tumblers in the right position to be able to turn it. I want to remove the broken tip but when I took out the ignition stitch it didn’t look like there was a backing plate to remove to get insides. There are three small copper screws that look like they are only holding the connectors in place. Is there a plate I can remove after I unscrew the copper screws? Or is there another way to remove this broken tip? (I believe the tumblers are holding the tip in place) Or do I new to get a new ignition stitch? Thanks JOHN