I'm trying to convert my G-23 to CH ignitions.... I have 2 quetions and a drawing to ilustrate 1 of them....
The drawing will probably explain better, but does the magnet get mounted on tdc and the sensor @ 30 btdc??? see drawing please

the other question is.... does the diameter of the hub where the magnet is mounted matter???I'm trying to lighten up the g-23 and the ch system has a extra hub for the rear shaft and i don't want the extra weight.... can I tap the prop shaft that comes with the engine, mount the radio shack magnet and get good results????
thanks