Briz i had a very similiar problem. flying around then all of the sudden the blades just decided to do what ever it felt like. After i landed i noticed this screw was missing (the one in the pic) This is off of the king bee V2 CNC and now i cant figure out which screw to get to replace it? anyone have any thoughts?? i bought some 2-56 but they were to big! i have looking around but no one gives any specs on screws. can someone point me in the right direction?? THANKS!!