I searched. Google said a lot of people have had this problem. Go to put the rail back on, the old pintle caps are brittle from fuel, they bust, pieces fall in during extraction.
I got a couple big pieces out I could see with vaseline on a long pick. There's still a few fragments in the front cylinders nearest the ICM bracket.
Solutions without head removal range from inspection camera to just run it. One thing I read was to remove the spark plug and blow air into the injector hole, forcing the pieces out. Using compressed air sounds like it makes sense. My other thought is that it should just blow out once it fires, but I'd like opinions first.
Let me know. Thanks!