I think you might get your self into a more trouble than its worth. Ignition trigger wheels are a science on there own. Andy has told me before and ive seem RC30 ones with it, that there was a few PGM units made with a removable Eprom. Maybe you could hunt high and low for one of them and go from there. Burning a new Eprom chips isnt hard if you found one.
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If I have to take the carbs off once more...