I equipped this M3 with a Photosensor Servo Powered drop system originally made for an Air2S. What is unique, is that the photosensor uses the Mav3s Landing Light (just one side). and the servo arm Extends out from the side below the rotors of the drone instead of directly underneath, so as to not disrupt the drones bottom sensors when there is a payload. I find the standard drop systems with the release mechanism and payload being under the drone causes the drone to often climb because the sensors think there is an obstacle below. Putting the servo and drop pin to the side prevents this problem. When tested the drone did not wobble or drift at launch and flew normally.