Unboxed 1st drone and began installing DJI prop guards purchased from DJI. No problem with three of the four. One screw of the two on the 4th would not grip. From what I can tell, it is an issue with the threading of that hole on the drone itself. The smaller screw grips just fine deeper in the hole but the prop guard screw does not. Do I return the drone or learn to fly without the guards?