Yeah I have found that there are all types of different structure. And different fish like different structure. Tire structures as eash to make and cheep for the most part. Lost of times you can get used tires for free!!! And free is good. The fish smaller ones like to hide inside the tire. Some will even breed inside them. They are a good form of protection.

The only difference between a rut and a Grave is the depth. So get up get out of that rut and get moving!! Time to work!!