I want to shoot competitively, but my work schedule (LEO) demands I work every other weekend. Also, how much does it cost per year to join? I have read about the different classes and being in law enforcement, I guess I would gravitate towards that, but at this time, I am not all that great of a shooter. I just don't want to be dropped in a class where I couldn't stay afloat. I have Trijicon night sites installed on my GLOCK 27, would I have to have them removed to use that gun in any unmodified class? I am going out on a limb and assuming that since I live a stones throw from GLOCK headquarters, there will be a nice number of matches in my area. Any info that could be provided would be great!