To all: Happy New Year! I had planned to purchase a P3A last September but was concerned regarding all the issues re stress cracks, etc. that I was seeing. Put purchase on hold until now. . 1- Are people still seeing stress cracks right from the new box? 2- For those of you who returned them to DJI for repair, what was sent back? 3-Some threads state that the new shells received appeared to be reinforced and with new motors. Are there visual clues to determine if this is a new shell and with new motors?