I primarely fish flatheads. But I've spent a good amount of time fishing channels last year. I fish a small river and the channels are not that big. The average size is about 19''. I have wondered that I am fishing with to big of a bait. (I fish with about 2"squared piece of cut shad.) But I have many times caught 20" channels on a 4" live bluegill. What size of baid do you fish with?