I have been looking at the techpubs.deere website trying to decide what manual(s) to get so I can do more of my own repairs on my 8410.  There are "Repair", "Diagnostic", and "Operation and Test".
Which of these would I need for general repairs, or will I need all of them to help diagnose and run calibrations on the different systems?  I am guessing I would easily justify all of them in just a repair or two, but don't want to purchase more than I need, if necessary.
What is the general consensus from the knowledge base here?