First of all, I bought my first springfield the other day and it happened to be a XD-9 with night sights and I love it. I am not used to these types of sights because I am used to the 3 red dot sights alot of guns have. (im a novice shooter) I love this gun but I cant seem to hit with it very well. I know its me and not the gun. When I aim it, am I supposed to line up the rear dot exactly with the front dot or do I line them up with the front dot raised slightly? thanks