DJI Mavic Bait Drop

I decided to share this thing :-)
This can be used for fishing bait drops or anything that you wish to drop from your drone.
I have used the bigger box because I use a 9volt battery to power the Adriano and Servo motor. I have designed the box that hold the controller and battery separate so it can be change to what size the user like. The box is hold by 2 screws.
I had created a release pin, but found that a metal rod was very smooth so I was going with that.
The code for the Arduino is al