I had the tailboard on our first 9870 and hated it wouldn't own one again. In 70 bu. soybeans with a 35ft. platform to run it slow enough not to throw chaff in the standing crop then the spinners would plug especially at night when things got tough. As far as swapping them from combine to combine deereman guys that have run them for a few years are finding out that they wear out and it gets costly.