In my last posting I said the new O2 flashes much less than 5/10 seconds whereas the LHS O2 sensor is completely normal. My mistake, I should have said the new RHS O2 flashes much less than 5/10 seconds whereas the LHS O2 sensor is flashing completely normal.
Good thing I'm snapping the camera at everything I do, right? Here are the pictures of the old 3 RHS spark plugs that have since been replaced.
I have not checked the LHS spark plugs yet. I expect them to be charcoaled as well.