I had an 06 2388 with an 2608 chopping head and had to blow rotary screen out ever three hrs. Traded for 08 8010 put rotary screen brush in and it worked ok but during the days running the temp. would go up two bars. Every morning I had to blow out the rotary screen. The flat part of screen would be pluged up, were the brush ran was clean. The brush runs when you unload grain tank. On my 8120 I put the brush and vacum system on it. I live in south central Ky.