So im slowly going over the frame as well, looking for damage. I have noticed 3-4 spots where the paint has chipped away revealing some surface rust. Need to take care of that, just need to find a similar color spray paint...
Im srarting to think a yearly engine pull is in order, theres alot of nooks and crannies that harbor dirt/mud. Plus engine mounts need greasing. Pulled the frame drain plug to check the filter, looked clean aside from a lone long hair?!
Plan on splitting the case tomorrow and seeing what parts I need to start ordering.
You cant fix stupid, but you can sedate it.