To take ignition one step further, there are two types of electronic ignition. One uses an electronic automated advance mechanism such as the CH syncrospark. The other uses a mechanical advance through a rod from the carb likkage to a ring arond the prop shaft housing. Both types work well and both types are superior to a magneto ignition.

Get in touch with RCIGN1. He's supposed to have some really wonderful things with a G-62 and electronic ignition systems. He may or may not be marketing the set up, but if you're dead set on a G-62, he would be a good person to ask questions about the engine and systems.