I am going to have to read up on the John Deere yield monitor calibration proceedure. I am under the impression that there is no provision for different flow rates in the calibration procedure on John Deere yield monitors like there is on AgLeader yield monitors. I believe this is a known and significant disadvantage that John Deere has in terms of accuracy.

Without having studied the procedure at all, I am under the impression that with the John Deere system you empty your machine, then tell the display that you're going to start a calibration run and you cut for a ways. Then you let the machine clean itself out in to the grain bin, dump on a weigh wagon or grain cart with scales or send a truck to town or whatever and you tell the machine how many pounds/bushels/whatever it cut in the test pass. Then you're done. No partial header passes to simulate low yielding environments, nothing, just type the weight in and go. It's faster, but not nearly as accurate for wide ranges of yield.

For you guys that actually run Deere combines rather than hiring it out, I'm sure you can correct all the things I don't know, but that's my understanding at this point in time.

Anyway, thanks for continuing to followup on this. You've given me a lot of food for thought.