Ghosting between 2 gopro 13s

Hi,
im tyring to sync to gopro 13s mounted on the 3d printed mount posted on the website and, even when i sync manually the frames, i get weird ghosting between the 2 cameras.
what should i do

Calibration is needed for GoPro 13: GoPro Hero 13 Support + Mount - #2 by gchen

Here is a link to a folder with a few different videos that could be used for calibration: Calibration - Google Drive
all the videos are shot on the same gopro Hero 13 black at 5.4k Wide at 30fps. if you could calibrate it it would be great! appreciate it

Save the following content to a json file, then press the ‘load from file’ button in the camera selection dialog and select the json file.

{
  "distortion_coefficients": [-0.49847742476663365,4.001025225752339,-6.246353058519555e-05,0.00046964989012820383,0.41917307165530937,-0.2416337025887686,3.8978261557488127,1.3656379056342862,0.0,0.0,0.0,0.0,0.0,0.0
],
  "intrinsic_matrix": [2399.387349254747,0.0,2669.922315310652,0.0,2395.629766607383,1483.6672315528683,0.0,0.0,1.0
]
}

Great, appreciate it loads, let me give it a try and let you know how it goes!