Me
Its just a cheap chrome cover that I cut the top off, to be able to adjust the rockers while the engine is running, and hopefully not make a mess. To keep myself from cutting my fingers on the sharp edge, I covered it with a piece of vacuum hose. I also wanted to see how much oil pools under the valve cover at various rpms. I have a high volume pump and I tried to improve drain back a little, but I didn't hog out the drain holes. Just cut some reliefs and grooves here and there to help drainage, guiding the oil towards the holes and away from the edges.
