My Oil pan baffle
 

Here are a few pics of my oil pan baffle. I didn't like the lindsey rivets and piano hinge design, so I made my own using BMW motorsport non return flaps. The aluminum piece was cut on a CNC waterjet. The first pic is poor quality but you can see the flaps are supported on all edges so they don't cave in when being pushed by the oil, and there is a relief at the bottom to allow oil to escape when changing oil (to minimize the amount of used oil left in the engine). The relief is small enough that the amount of oil it will let past in a left hand corner is insignificant.