I'm debating whether I should send my V1 rev 3.813 in for a tune-up ($45) or just upgrade it to the current 3.863 ($85 plus shipping)? I live in the only state that banned RD. Need your advice fast. Also after youtube and seeing videos of some V1 in action I think mine doesn't detect as good as the ones in the videos. Their RD range more than a mile and I don't think mine can do that.