Re: trigger help
Yeah, you tighten the allen bolt that is in the hole recess above the trigger to reduce the travel needed to make it fire. Careful not to tighten it too much or you may get the bouncing symptom mentioned in another thread. Also, it is possible to tighten it so much that you are already passed the firing point.
Just pull the trigger with the gun off while you are adjusting it and listen for the little "click." That is the point at wich your gun would fire.