Jason, I really appreciate your help and input!! now i understand the khz's a little better. I was just reading about it in the humminbird book and it was still a lil confusing but after reading what you sent It makes a lot more sense! I appreciate your time and may bug ya with some more questions after this weekend because im gonna get it on the water soon. By the way, Im assuming that when you downscale your left and right viewing footage on the side imaging from say 150ft to say 80, everything would appear to be right at twice as big on your screen. Kinda like zoom in a weird way?