Did you get the dealer to re-configure the computer? They come from the plant with a warning that only signals when the beater is below a certain % speed for greater than 30 seconds or something ridiculous like that...by that time you are usually plugged. They can change the warning to signal when the beater drops below a certain % speed for only 3 seconds which gives you enough time to slow up and let the combine clean itself out. After we got the dealer to make this change with the computer we didn't have a problem plugging. A speed up kit is a good idea also, the beater should be going 50% faster than the rotor...then there would be no bottleneck...the beater would always be able to keep up with the rotor material.
for anyone that cares, you just need to see your local John Deere dealer with this solution # and they can help you. Solution Number: 81972, – Installing the following parts will increase the discharge beater speed from 850rpm to 1000rpm: sheave AXE13665, belt HXE16940, and spring gauge HXE16931.
I also put those paddles on, not because of plugging but to keep pea straw from wrapping
on the rear of the rotor which eventually lead to fire.
It was about 95% effective.
Must be a reason it's not standard, at least on small grain, but it's lost on me.