We run a 2388, we have an 8 row all crop we use on it. We set the chopper on low speed with the blades all the way open (coarsest cut). And away we go, works just fine just doesnt really do anything. We also remove the spreaders from the back and just drop the stalks straight out the back. Really helps keep that fine dust down. This will be our 3rd year doing it like this.