I had a custom Valor done in 38 super. While at the range last week, I noticed it started shooting to the left. I then saw that the front night sight had moved. It was loose and I was able to slide it off. I noticed that the sight and slide had been drilled for a pin. I don't know if there had been a pin installed but I doubt it. There was some red residue in the sight notch which was probably loctite or some other adhesive. My question is should I try to get a pin and install it or just locktite it back on. I would probably try blue first to see if it holds. If not, I can always go to red. Not sure what size pin I would need.