Hello Folks, I have a JD 3020. About 2 years ago i put electronic points in it. The tractor has ran great since. About 6 months ago it started running rough and losing power until it wouldn't run at all. Someone told me to replace the coil. That fixed the issue. But only for a short time. Then it started acting up again so we replaced the coil again. This coil even lasted less time. My question is. Is there a specific coil I should be using? Or is there something else wrong? Is it possible the replacement points went bad?