Good video, but I am a little confused how you found TDC. I usually open up the valve covers in 4-strokes to find the TDC in order to make the valve adjustments. In this case, I would adjust the piston stopper from the valve lifters' motion to make sure I am at TDC, and go back 30 degrees BTDC to align the Hall sensor with the magnet. Please let me know if I am mistaken. Thanks.
You mentioned that there are Hall Sensors connectors with 3 Pin for single Cylinder, and Connectors with four Pins for Radial engines. What is the difference. Any Hall sensor has always just 3 pins. Are different hall sensors used for radial engines?