We have a late model F3. We are new to Gleaner so we've had a couple of problems. In soybeans the cylinder slugs A LOT. Need new bars? Which kind? Problem #2 in corn the walkers & chaffers plug constantly; I think the walkers are the worst. We have run Deere 4400's before this. These problems are new. What's the answer? I know F's have cut a kazillion acres so I guess I need the right combination. THANKS!