[armandozx]

well let's consider this 1st why do you think you are missing the shots? Is it poor aiming on your side or do you think the gun has problems? You're power set up seems normally fine how long is your band? I don't think the trigger mech has anything to do with your shots my friend is the loading fine on your gun?

1- I don't think you need to use 2x16mm bands for such a small gun.
2- Either 18mm or 19mm would do just fine, use this for best results 19mm band x 58cm in length.
3- Work on your aiming you may be shooting from a diff angle that in reality your shots may not be as accurate as you think.