Does it need to be an eagletree, and what exactly do you want to measure? I have a sentry pro from novak with all the sensors and software I could lend you in about a week or two.
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doesn't need to be an eagletree; I didn't know there were others! I just really want to see my amp draw, and voltage info. that's about it, anything more is just icing on the cake. I believe the novak system does that stuff. How hard is it to hook up?