I have a colt Official Police Post 1945 model with slanted sight. I was looking at it and the sight looked a little tilted to the right. I took a writing pin out of my pocket and layed it on top of the frame up to the sight and the sight is definately tilted to the right a little. I can't tell if it is the sight itself or if it is the barrel that is screwed too far in. Is this an easy problem to correct?