turn signal switch/arm question issue identified and solved

The screw is original, I thought the arm was original, but that is why I'm asking for advice. The switch is definitely not original. I replaced all the wiring when the car was rebuilt 3 years ago. I did pull a switch from an old column that still had the chrysler tags on it and that bushing/insert had the same V groove that the repop did. I should post some pictures here.