I agree about the percentages. But i am always messing with how deep my downrigers are. When I mark bait I will raise or lower to run to the bottom of the bait balls. But in the morning early at first light I am always shallow and it is when I catch the majority of the nice sized keepers. During high sun yeah I run on the bottom almost always. I like to vary depth allot more when I have another guy in the boat, mostly fish alone.