Good point on the quality issue, last time I did mine, I found one scorched & didn't have time to wait for a new one from Merlin, so I hitched a ride to the nearest parts store...
Speaking of contaminant intrusion, I've found that "spirited" splashing through 3-4" deep puddles is enough to introduce water/mud into the hub.
Can you say "red iron range mud"? ...![]()