VMax Gen1 Carburator Synchronization Carb sync

Yamaha VMax Carburator Synchronization - Gen1 Carb sync
When it was time to sync my carbs, I was not able to find a video explaining how to do, or the video was not clear and shaky.
I am not an expert, but I hope it will help any one who wants to do this.
The tool I used is not the best... but it is the one I had :-)
Another tool available to do the job: www.TheDigiSync.com (untested).
Let me know if you have any feedback.