I have not seen any metal peaces come out. On my drain plug which is magnetic there was a very small amount of very very fine metal. I was told that was normal wear.
yea seems good. No leak. I also did a test I took a empty bottle of water put 2 oz of water and 4 oz of oil. Shook it a few times and sure as hell the water stays on bottom and the oil floats on top. It dont look like that my LU leaked some water in.