I agree with Rick, the 40 dgr will hinder your ability to tell where the fish are left to right. I have a livescope and the 20dgr makes it much easier to do. I recently watched a webinar on livescope by Garmin who used this as a tool to show why livescope was better BECAUSE it had a 20 dgr and that the competition had 40 and it wasnt as good. So I doubt they would put out a 40. If they do, don't buy it.