I have the GCV20 Sonar Box with the GT34UHD transducer. I have it paired to a 1242xsv unit. I have not been able to get the side/down imaging quality to be comparable to other brands. In fact, my old Lowrance HDS gen 2 had significantly better returns than my Garmin Being "Ultra high def" i expected a lot better product from Garmin. I have scanned brush piles I fish regularly and can hardly get the side scan to show anything. From what I could tell after messing with the unit, the only changes I can make is the contrast, brightness, and palette. Is there anything else I can do to improvement my quality? Is there a better transducer that I need to install? I currently have the most current software update. I primarily fish lake of the ozarks if that makes any difference. I love everything else about the units but am about ready to trade them in if I can't resolve the image quality. Any tips or advice would greatly be appreciated.