I went through what I have and I do have a plastic skid and some milk crates. I'm thinking I can make something similar to what shows up in the structure thread. I'm thinking that should make some excellent forage structure as fish of a certain size won't be able to get inside of it. I'm thinking I could place that near the rock ledge like suggested above. I also love the idea of some more rip rap. I just need to source the rock!