G’day all after some settings for haversting windrowed canola. Crop yield is around 2.5T to the ha. With reasonable grain weight. Current settings are. Concaves large, small, slot, slot. Rotor speed 580. Fan speed 650, pre sieve 2, upper 10 lower 8. Can’t seem to get the capacity out of the machine. Get around 13t an hour above that starts loosing it over the seives. Thank you.