[jmatta]

"Yes, removing the sump plate is a necessary evil.. The design of the area around the drain plug keeps debris in the sump during an oil service.. Pull that sucker and inspect!"

I feel it's worth the effort, as that's how you found the original poster's bearing was in early failure stage. BTW, your YouTube video on the LN deep sump plate makes the R&R quite simple for those who have not performed this task.

This thread has been quite enlightening and I truly appreciate the time and effort you've put in to educating owners on what troubles may be lurking within.