This is our first year with the 590r combine with a honeybee header. I hooked up the head the other day. Ran it today. Everything worked good except the reel speed was super fast. When I choose the reel with the rotary knob the cebis shows 11.8 mph. I drove around the yard a bit but no change in speed no matter how fast I was going. Is this a control valve problem or just a setting in the cebis? The owners manual hardly mentions this stuff. Thanks.