Mbman,
After your post, I decided to do my 300 hr service at 225hrs, I'm glad I did, removed the screen and it had metal shavings like yours, wish I'd cleaned the screen earlier. After I removed the screen, I cleaned the shavings out of the banjo fitting and pulled it aside and stuck my finger in the housing and pulled shavings out of there too. I would not have suspected there would have been that much trash in there.