3d printing timelapse - earpods holder

I want to make a cable release for shooting timelapse photos while printing.
https://youtu.be/T40UcCUO5e0

Required:
1.A smartphone with a 3.5 mm headphone jack
2. Apple Earpods
3. M4 Screw (8mm or 10mm), M4 T nut
4. small tripods

Flow:

1. Open the smartphone's camera app

2. Press "value up/down" to trigger the shutter

3. Print this model, put the earpod on as the photo shown

4. Fix this model at the y track. Or any position on the aluminum extrusion.

5. Measure the trigger position by slowing moving the car.
   e.g. y=159 will trigger the camera

6. Add "G1 X0 Y159 F9000" at "Layer changing script" in our model slicer tool.
   On Cura:
   Extensions > Post Processing > Modify G-code
   Add a script > Time Lapse
   Set x and y position

On Simplify3d:
Edit Process Settings > Scripts > Layer Change Script
add "G1 X0 Y159 F9000"